Its in Rutland Sq on the left going up the main street from the roudabout towards the bridge. Just past the RBS and the butchers.

http://uk2.multimap.com/map/browse.cgi?client=public&X=421750.952160584&Y=368750.34499176&width=500&height=300&gride=421719.9521

Put the scale to 1:5000 you should then be able to see the road names