Most weeks around £100 for the two of us plus dog food, (I buy cat food from the vets) plus a take-away once a week (approx £30) and probably about another £25 a week at the corner shop on last minute stuff!
I spend about £40 per week on a main shop, and about £20 through the week, for me and one pampered cat. That includes toiletries and household stuff (which I always stock up on when it's on special offer - I rarely pay full price!), wine and lunches for the week.