Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

A sniffer dog is pictured at the site where police started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

A sniffer dog is pictured at the site where police started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police searches near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police carry a container at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police carry a container towards the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police carry a container towards the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police walk near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police walk near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police walk near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police works at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

An excavator is pictured at the site where police started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police set up a fence at the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police vehicles are parked near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police vehicles are parked near the site where they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Journalists work near the site were police started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Police walk along the site after they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

A police tent is set up after they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Journalist wait after police started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

A police vehicle is pictured after they started digging in an allotment area near Hanover, Germany July 29, 2020, where Christian B, a suspect in the Madeleine McCann investigation lived for a while some years ago. REUTERS/Fabian Bimmer

Rajinder Singh skips on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh skips on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh waters plants on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

Rajinder Singh exercises on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs TPX IMAGES OF THE DAY

Rajinder Singh cuts the grass on his allotment in Harmondsworth, the 73 year old is raising money for the NHS by posting daily workout videos online and is gaining a following on social media as the 'Skipping Sikh', following the outbreak of the coronavirus disease (COVID-19), Harmondsworth, Britain, May 7, 2020. REUTERS/Paul Childs

A mural of former Sunderland player Raich Carter is seen in the background as gardener Peter works in his allotment, amid the outbreak of the coronavirus disease (COVID-19), in Hendon, Sunderland, Britain, April 21, 2020. REUTERS/Lee Smith

A mural of former Sunderland player Raich Carter is seen in the background as gardener Peter works in his allotment, amid the outbreak of the coronavirus disease (COVID-19), in Hendon, Sunderland, Britain, April 21, 2020. REUTERS/Lee Smith

A man relaxes on his allotment in Gateshead, as the spread of the coronavirus disease (COVID-19) continues, Gateshead, Britain, April 8, 2020. REUTERS/Lee Smith

A general view of allotments as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain, March 29, 2020. REUTERS/Lee Smith

A woman works at their allotment in Verdin Park, as the spread of the coronavirus disease (COVID-19) continues, Northwich, Britain, March 26, 2020. REUTERS/Molly Darlington

A person works at their allotment in Verdin Park, as the spread of the coronavirus disease (COVID-19) continues, Northwich, Britain, March 26, 2020. REUTERS/Molly Darlington

People work on their allotments at West Street Allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, in Hertford, Britain, March 26, 2020. REUTERS/Andrew Couldridge

People work on their allotments at West Street Allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, in Hertford, Britain, March 26, 2020. REUTERS/Andrew Couldridge

Nick Cheal poses on his allotment at Cromwell road allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, Hertford, Britain, March 19, 2020. REUTERS/Andrew Couldridge

Nick Cheal working on his allotment at Cromwell road allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, Hertford, Britain, March 19, 2020. REUTERS/Andrew Couldridge

Nick Cheal poses on his allotment at Cromwell road allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, Hertford, Britain, March 19, 2020. REUTERS/Andrew Couldridge

Nick Cheal poses on his allotment at Cromwell road allotments in Hertford as the spread of the coronavirus disease (COVID-19) continues, Hertford, Britain, March 19, 2020. REUTERS/Andrew Couldridge

Alan Stokoe at his allotment in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

Alan Stokoe poses at allotments in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

John Burlinson, 71 poses on his allotment in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

Alan Stokoe poses at allotments in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

John Burlinson, 71 poses on his allotment in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

John Burlinson, 71 on his allotment in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

John Burlinson, 71 with Alan Stokoe at allotments in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

Hannah Foster on her allotment in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

Hannah Foster on allotments with chickens in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

Hannah Foster on allotments with chickens in High Handenhold as the spread of the coronavirus disease (COVID-19) continues, High Handenhold, Britain March 19, 2020. REUTERS/Lee Smith

General view of allotments in Pelton Fell as the spread of the coronavirus disease (COVID-19) continues, Britain March 19, 2020. REUTERS/Lee Smith