In reply to Šljiva:
I went to FCQ this afternoon. The lock had seized but released with WD40. I had already bought a new lock after some people, including myself, had difficulty reading the numbers. I have changed the lock so it should work OK now. Although the lock is very similar to the one I have just removed. The combination remains the same but the numbers must be aligned with the black marks then the hasp (loop) can be pulled open - no need to press the hasp into the body of the lock before it opens.
Ian Butterworth
BMC Access Rep for Somerset & Mendips