Bubbleboy's guide to eating cheaply in London

London is generally regarded as one of the most expensive places to live, work and play in the world, but there are still a plethora of cheap places to eat. I will grant you that a fair majority are of poor standard, but a good few shine out as beacons for the skint and hungry.
Here are a few of my favourites:
'Tai' Veg Noodle Bar, 10 Greek Street, W1 - one of many 'Tai' veggie and vegan cafes in London - an unlimited buffet of 'mock' meats, noodles, rice and veg all for a £5 (approx)
'Leon' - there are now 8 branches in London serving cheap Mediterranean style wholefood, the sweet potato falafels are lovely. The Spitalfields branch is my favourite, is has a great outdoor area.
Any of the Indian restaurants on Drummond Street, especially 'Chutney's'
'Wetherspoons' - for their ultra-cheap veggie breakfasts for £2.49 (and they use free-range eggs!)
'Jai Krishna' - a brilliant cheap Indian veggie restaurant on Stroud Green Road, Finsbury Park (now has another branch on Turnpike Lane)
Any of the Indian cafes on Turnpike Lane, especially 'Salim's'
'Mega Bite Cafe' - a very plain ordinary looking Chinese cafe next to the Emirates Stadium which serves mountainous plates of very good, cheap Chinese grub (also 'Green Jade' on Holloway Road, another great cheap Chinese cafe)

and last but not least, the thousands of cafes and 'greasy spoons' in London, with their 'Set Breakfasts' and 'Roast Dinners'.