I will second MJR's comments
Why not just add Ipswich meets to ALUG ?
I'd happily attend Ipswich meets because they are nearer for me than Norwich and if I had the time I'd actually organise a meet myself. But I'd rather be a member of one LUG than two and given that it is the Anglian LUG it doesn't have to be Norfolk centric (even though at this point in time the Norfolk members are the most active)
For me the mailing list/kit meets/IRC gain value through more members and therefore from this lowly members perspective one bigger Lug is better than two smaller ones.