Imagine walking around with a tray of home made chocolates ... mmmmm !
You would need to get your hygiene certificate, show the environmental health officer where you make them and possibly get that place certificated too and also your method of wrapping and storing the individual items.
Today I went to get my Pedlars Certificate renewed in Bournemouth, it did say something about food and I quote:
So, you CAN sell foodstuffs but you must make sure you've got the right certificates before you do.A pedlars certificate does NOT authorise you to sell foodstuffs. If you intend to sell foodstuffs, you must seek advice from the relevant Local Environmental Health Authority before doing so.
Just having a Pedlars Certificate is not enough.