Thanks for the replies ladies.

Jack is putting on plenty of weight, he has put on almost 2kg since birth,and has plenty of wet and dirty nappies.

Last night he fed really well at 6pm, then we went out for dinner (he slept most the time) and when we got home he fed really well again at 9:30pm and went straight to bed and woke up again at 3am and 7am, so no fussy time last night (of course, after I post it doesn't happen, LOL).
I think that you are right Barb and it may just be his unsettled time, will see how he goes tonight.