What British things to give my American wife?

My American wife is moving to the UK to over the summer. I'm going to greet her at the airport with a big poster, welcoming her to ol' Blighty. I wanted to give her a goodie bag of all things British to formally welcome her as an honorary Brit.

I'm gonna welcome her with a cuppa and we'll eat some marmitey crumpets too. What else should I give her to properly welcome her to the UK?