Hi I am not in your area so can't recommend specific ones, but i attend three ones in my area regulary.
One is my NCT group, most of us still meet, to be honest this is my least favourite, most of the mums are pretty cool and yes there is the one competitive mum who doesn't seem to be able to say congratulations when someone else's child reached a milestone before her wonder child. But the real disadvantage of this one is that all our children are the same age so you can't get advice on new thngs as either we are only doing it ourselves or haven't done it. But it gets us out of the house one day a week so keep going.
two: Bumps and babes run by the NCT (but you don't have to be an NCT memeber to go), i enjoy this the most as the children range in age up to about 16 months at our one. So you can get advice, the mums at this one are pretty down to earth and it gives Logan a chance to see children of different ages.
Three post natal class meet up. Not sure if all NHS trusts run these clases, there are about 5 classes covering weaning, teething and massage. Some of us meet up after we finished this, it was driven by social mums who didn't join NCT so want to get out and we have a great time, Most of the babues are the same age again, but there are some second time mums so still get advice.
On Monday i thought i might go to a Netmums meet up in our area, can't comment on it yet as this is the first time, but hopefully some of these things run in your area so you could join your local branch.
It is a bit like being the new kid in shcool wehn you first go to things like bumps and babes, but everyone is friendly always ready with advice and you soon make friends, i did find it easier the earlier i went and there are age guideliens, for example B and B you should stop when your child is starting to walk as then it gets dangerous for other smaller children, but there is then a follow up group to attend.
Hope that helps a little.
Sandi