True, but technically both are

- North of the Mediterranean sea

- West of the Ural mountains

- no land route to America

It might include lots of Canadian islands, though. Maybe specify that it needs to be on or east of the mid-Atlantic ridge as well.

If we talk about "mass of land" - and wanna split hairs :) - it does not include the ocean I guess.

Remember that UK is very close to continental Europe

Strait of Dover is just 33 km wide.

One could almost swim from one side to the other.

And there's a tunnel connecting the two, you can already go by train from France to UK.

Ireland and UK are even closer than that (about 20kms)

And they are all the same "mass of land" as in tectonic plate.

Iceland for example cannot entirely be considered Europe, the Eurasian plate cut it exactly in a half.

Anything east of the Ural mountains is also west of the Ural mountains if you travel far enough. :)

that's why we have invented the concept of "greater distance" :)