apostrophe or not?

[coolbeans]

Aargh - my brain has gone dead, and I've got to submit this copy NOW - pl. help, apostrophe or not?!

Today, some of Britain's top illustrators ....
or
Today, some of Britains top illustrators .....

Thanks

Britain's

Yes, the illustrators 'belong' to Britain, so it needs the apostrophe.

Yes.

thanks
cbx