We got delivery from here which while 10 minutes later than promised (boyf v hungry so getting concerned!) was well worth the wait. Delicious beef red curry and prawn pad khing (with ginger). That and some spring rolls and one portion of rice came to about £20. I'll definitely be ordering from here again.
UPDATE - I'd really recommend the sort of fried fish dish from here
UPDATE 2 - green curry also good esp with prawns read more