http://steampunk.synthasite.com/This event at Lincoln was a blast.
Steampunk is growing around the UK definitely, to the point I was able to open stalls at conventions selling leather goods directed towards Steampunk market, most film and comic conventions are adding Steampunk to their talks and displays and Showmasters (London Film and Comic Convention organisers) have been encouraging steampunk costumers to take part, although I didn't agree with one of the costumers they invited to talk on behalf of the steampunk community, they did a cracking job and are certainly welcoming Steampunk cosplayers into their conventions.
Though with the coming of the new mad max, beware of the diesel punkers will also be growing and sometimes Steam and Diesel can collide and be mistaken.
If you have a Facebook account, there are plenty of UK based Steam Punk groups to join, simply search Steampunk UK and Steam Punk UK, also you'll find most of the UK community seem to be further north, definitely less around the south and south east than just a bit futher north..
Also a lot of Steampunk in the UK can be found in LARP events (Live Action RolePlay) mostly southern and midlands for them that I've seen though, still don't be scared to google Steampubk larp UK!
I've been away from the country and most the work I've done have been private commissions but I will likely be pushing my facebook and ETSY page into activity again into activity as things get more settled after having moved abroad, but you can see some of my leather work on
www.facebook.com/robinandmagpieAnd if you watch Emmerdale (not likely but always worth mentioning) I have supplied to ITV Studios a few times, so if you see a leather item that does not look like something you'd often find, it's likely made by me.
Feel free to ask any questions, i also know a couple of tinkerers who consider doing commission work, incase you need any specific props made.
Most steampunkers work on.commissions or make stuff themselves, but etsy is a curse and a blessing to the steampunker, you'll find works of art and the perfect part for your costume, but beware the bronze painted swimming goggles that flood etsy.