You might remember my previous post in which I challenged you to name the famous scientists on the Royal Institution’s new wall of fame.

Well, I made a bit of a goof. Turns out the sitters were all architects and benefactors connected with the Royal Institution, and not researchers. I now have the answers for that one, but will hold off a bit longer in case anyone wants a second look.

This time round, I really do have a wall of scientists for you. And at least one of them has appeared on a UK bank note. Guess away.