Vegan Marshmallows in the U.K.

Great information from a vegan in the U.K!

For everyone in the UK: Holland and Barrett sells 90% soy protein isolate in big containers in the weight gain supplement section; just make sure you don't get the flavoured stuff with added egg white. The "vegetarian gelatine" I saw sounds like the supercook brand stuff described in this thread, but I think they may have recently changed their brand name to Dr Oetker, since that's what it said on the box I spotted in Morrison's.