Popped into countrywide (Evesham, Worcs) today to buy some lambing etc stuff and they have these vegetable kits in the brown paper bags - RRP £2.99 but they are selling them at 50pence each. Not sure if its same price in National stores or just ours but worth a look?
I bought tomatoes, leeks and red onions but there were loads to choose from and they can be used up until end of 2012