Stupid road markings

this one confuses me every time, a T junction, but for some reason only cyclists AREN'T allowed to turn right....? I have no idea why..... it doesn't turn on to a dual carriageway or motorway just another regular road....

http://maps.google.com/maps?f=q&source=s_q&hl=en&q=Grosvenor+St,+Manchester,+Lancashire+M1,+United+Kingdom&sll=51.525946,-0.124347&sspn=0.000656,0.001211&ie=UTF8&cd=1&geocode=FTjpLwMdx-3d_w&split=0&ll=53.468956,-2.241066&spn=0.001255,0.002422&t=h&z=19&layer=c&cbll=53.469004,-2.240909&panoid=ri5O6pwzXvxDt1mDuC9p6Q&cbp=12,255.7,,0,12.24

you might have to move about a bit streetview to see it heading the right way, a car is covering the sign when you are looking towards the junction

The arrow means "right turn only" and the 'except cyclists' means "but cyclists can go straight on if they want". read your highway code