I'm also British, by the way, and 33 and married. The badgering about when I was going to have kids was worse after we just got married (5 years ago), but has largely settled down now. I have also got better at shutting conversations down if I don't want to have them. I find giving a confident "no" to being asked if I have children with no follow up explanation usually works in not being asked any further questions. In the past I used to answer less confidently and that used to lead to lots and lots of questions and comments, which used to bug the hell out of me. Needless to say, my husband rarely gets asked whether he has or is intending to have children. :/