Have a look at
www.babycentre.com there are 100s of different groups to join on there BUT it is American but don't that put you off from looking. The people on there aren't all from the US. There are so many subgroups it's unbelievable....I belong to a birth group ie. there is a board for every month where mums of that age child/ren chat. We share tips, worries, joys, development, personal Q., fun stuff etc. But there are a tonne of other boards too go and have a look. Click the 'boards a-z' and you'll see them all listed.
There is a UK version of the board on
www.babycentre.co.uk but I've not used it. The message boards are usually listed under 'community' or similar.
Hth
Debra.