Great Britain is the island's name.
do you need to capitalize "Continent" here?
@deniko
Since I didn't know either, I checked with Wikipedia:
https://en.wikipedia.org/wiki/Continental_Europe
"Mainland or continental Europe is the contiguous continent of Europe, excluding its surrounding islands.[1] It can also be referred to ambiguously as the European continent[2][3] – which can conversely mean the whole of Europe – and by some, simply the Continent."
Thanks Tepan, that makes sense.