Just thought I'd post this in case it's useful for anyone else in the UK who takes vitamins - I found today that Tesco are selling multivitamins + iron and multivitamins + minerals that are very cheap (about 85p for 30 or 60 depending which you get) - they aren't labelled as "Vegetarian Multivitamins" - but in small print they say "suitable for vegetarians".
Last time I looked at multivitamins that were suitable for vegatarians (ie. the ingredients were all vegetarian, as opposed to being vitamins aimed at vegetarians), the only options seemed to be some quite expensive sanatogen ones.