I'm in another sushi phase, come 1 o'clock nothing else will do. By far the best value selection I've found is at Nara on D'Arblay St. For £6 you can order a lunch special, they have a pretty vast selection of Korean hot dishes and a couple of sushi selections up for grabs.
I've tried the bibimbap - fine example of the dish but not as good as the sushi platter, prawn, salmon, tuna and octopus.
I've also tried the beef and pork dumplings which are seriously good but my favourite dish yet has to be the silken tofu in a hot and spicy broth topped with spring onion served with sticky rice.
As part of the lunch special, all main dishes are served with miso soup and salad and are all under £8. You also get a cleverly dissected orange for afters.
A bargain lunch just across the road from the office. Service is slightly vacant but sufficient. Watch your knees when you sit down, there's a cacophany of 'ow's' when newcomers are seated, the fittings for the grills are boxed under the tables for their Korean BBQ dishes, cooked at the table which I have yet to try.
9 D'Arblay Street