For two people its not to expensive it all depends what you are eating
We go to restaurant 4 times out of 7 , then we usually go to the Loveboat
or the kebab house that is really cheap you can sit in the garden its near the Jungle pub and the family that run it are lovely and you can eat there for about 10pound for both of you (couple of Kebabs and few few large bottles of Keo lager) to go with it .
We are usually 3 and paid about 35-40 in the restaurant
but this year we will be only 2 , so I will update you when I come back