put a wanted ad on gumtree or somewhere else saying you want to buy a mountain bike of that sort of description in your area... thieves often reply to ads so they dont make it obvious by putting an ad up where people might look.... i once bouht a stolen bike that way...good luck.
Thank you, appreciate the support. Got them on home cctv, hopefully the boys in blue will get a result. The theft is one thing, but whats more annoying is that they knew it was there, and came over the fence. They must have spotted it while the gates opened for a split second. Have been advised to get a ground anchor for the garage area. It also might be worth mentioning, if you are leaving your bike in town lock them down, big time.. Apparently there is a spate of thefts in the city centre.
You can set up alerts on eBay and Gumtree, with key words to notify you if a similar bike is listed. I'll post it on the BikeRadar stolen bikes forum. You might wanna make a post on other local cycling club forums/Facebook pages too.