The other day, passing through The Mailbox, I found this board.
Shogun Sushi and Noodle Bar in The Mailbox has always offered all-you-can-eat sushi buffet for £10, but it used to be only for lunch time. Evidently, now, it is extended to all day, from 12 noon to 11 in the evening everyday (except Sunday, finishing at 10 o'clock).
There is 10% obligatory service charge on the final bill (it is written in small letters at the bottom of the board). As the sushi here is virtually self-service, it is slightly odd, but this is not a buffet restaurant, so probably we can swallow that.
In the present air of economic uncertainity, to be able to eat out knowing how much we will be spending is a good thing, I guess.
