I get them from my local Budgens, but they're also available via Amazon:
http://www.amazon.co.uk/Willards-Fli.../dp/B003N7YCU6
They're vegan as far as I can see (though not labelled as such) and downright addictive in an I-can't-believe-there's-no-cheese-on-these-puffs way.
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