Souvenirs from London

My brain and it's wish list is a little eccentric.  My husband and I have been watching the Olympics and cheering each event, but I pointed out to him that very little of the national coverage is about shopping or delightful things in London.  This makes me feel encouraged about the book I am working on, A Delightful Tour of England; it is loaded with shops, sweets and treats in London!
Yes, the tv coverage encourages the audience to eat at an English pub (I recommend The Grenadier) and ride the London Eye, but what about shopping?  What about souvenirs?  You might have guessed that for me, a delightful souvenir from England is made of tin.

I loved these tin replicas of famous china patterns used by the Royal Family, that I bought one of each!  And the beautiful tins of tea, of course, that you can find at Harrod's or Fortnum and Mason.  What a wonderful treasure to bring home from London.  But my still-longed-for souvenir is a Fortnum and Mason tin bicuit box full of cookies...that is also a music box!  Can you stand it?  I loved the tin, the selection of cookies, the fact that it was a music box - the whole this was perfect, but felt too rushed at the moment to actually buy it.  I guess I have to go back!

What would you want as a souvenir from London?  Is it tin?