Studymum, for older bf babies it is true that 10 or so days between poos is quite normal. However in babies under 12 weeks, less than 2 poos a day can be a sign of problems.

Lozza, how is he going now? As has been suggested, usually these things improve by about 12 weeks, but if not you might need to consider trying a full elimination diet. Cutting out dairy won't work if you are still eating milk solids and these are found in quite a lot of foods, many that you wouldn't expect. A dietician will be able to help with a diet plan if it comes down to that. If you can hold out though, I'd wait a couple of weeks to see if it improves by itself.

If things haven't improved, post again and we can give you some other ideas of things to try.