Re: Community Manager Meet Ups (UK)
There isn't anything I'm aware of that Lithium are organising but that doesn't mean we couldn't try and arrange something ourselves. What are you looking to get from a meetup? I'd be game for attending though I'm going to struggle for bandwidth to organise it (felt I'd better mention that in case it feels like I'm volunteering )
As @Fellsteruk says hopefully once the dust settles on the Spredfast merger we may see some more activity like this from Lithium too.
There are also various groups on LinkedIn I'm aware of for CM professionals which you may have already looked at, fairly sure they have meetups from time to time though they will not all be Lithium CMs obviously.