What is the name of the island and the mainland if the tunnel is located at 51 degrees

What is the name of the island and the mainland if the tunnel is located at 51 degrees north latitude and 1 degree east longitude?

The first degree c. etc. passes through the British Isles. Britain is located in northern Europe and between it and the mainland there are two straits: the English Channel (sometimes also called the English Channel) and the Pas de Calais. Pas de Calais and is located at 51 degrees N. In connection with the increase in the flow of passengers, Frania and Britain have jointly built a tunnel for cars and the iron bargain, which passes under the English Channel.