Temple of Hackney is the original Temple of Seitan store and serves 100% vegan fast food such as its famous fried chick'n. Temple of Seitan also donates food to local homeless charities. You could choose from chick'n burgers, chick'n wraps, coleslaw, mac and cheese and popcorn chick'n. They also have gluten-free options available.
Watch out for them popping up at vegan fairs and markets too!
(can vary during public holidays)