Thieving scumbags

At the weekend I acquired a nice second hand Specialized Hardrock MTB in the hope of doing a bit of off-road stuff. Last night some thieving bastard(s) forced open the shed and nicked it. I'd only had it 4 days! Basically its the one below but with a different saddle (black and yellow), some better wheels (Specialized hubs and Alex DM20 rims) and a new deore chainset. Only saving grace was that my other bikes were ignored but I'm still gutted.

If anyone sees it around Sheffield please let me know.