Be warned though - it can be a very frustrating experience....
I've sat on one for the past two years. I don't attend all the meetings - they hold them at stupid times when it's hard for me to come, so unless I'm feelin flush and can afford to pay a childminder, I don't go, but I try to keep abreast of new developments.
When I do attend I sometimes feel as though people see me as a 'nuisance'. They have an agenda to get through - lots of mind numbingly boring stuff to do with the way maternity services are administrated and monitored, rather than policy issues.
And when stuff comes up that I CAN make a contribution to - well sometimes it's intimidating to put your view across as just a mum and a service user. I'm thinking now about the day I raised the issue of what women are told - or rather not told - about homebirth at their booking visit when place of birth issues arise - looked up to see the two GPs, the obstetrician and the paediatrician who also sit on the committee all trying their best not to allow their eyes to roll into the backs of their heads. Then the paediatrician told me that the RCP's stance on homebirth was that it wasn't recommended unless a full paediatric flying squad are on standby for every birth........
BUT all that said - pleeeeease do it. They so need to have a user input into these things.
Contact the head of midwifery or PALS at the hospital (patient liaison service) who should be able to do it.