A woman walks along the beach beneath Dover Castle in Dover, Britain, December 15, 2022. REUTERS/Peter Nicholls 

Dover Castle is seen above the town and seafront, in Dover, Britain, December 15, 2022. REUTERS/Peter Nicholls 

Dover Castle covered in snow is pictured in Dover, Kent, Britain February 7, 2021. REUTERS/Matthew Childs 

Dover Castle covered in snow is pictured in Dover, Kent, Britain February 7, 2021. REUTERS/Matthew Childs 

People walk near the Dover Castle during a snowfall in Dover, Kent, Britain February 7, 2021. REUTERS/Matthew Childs 

A large mural depicting the EU flag being chipped away, and attributed to the British artist Banksy is seen with Dover Castle behind, at the Port of Dover, Britain, February 14, 2018. REUTERS/Toby Melville 

A large mural depicting the EU flag being chipped away and attributed to the British artist Banksy is seen with Dover Castle behind it, at the Port of Dover, Britain, February 14, 2019. REUTERS/Toby Melville 

Adventurer Ffyona Campbell arrives to a welcome at Dover Castle in Dover, Southern England, August 4, 1994. Campbell arrived by ferry from Calais having completed the European leg of the walk she began eleven years ago. She has another 867 miles to cover en route to John O'Groats to become the first woman to walk around the world. REUTERS/Kieran Doherty (BRITAIN)