n or other atoms to which they are attached, form an azacycloalkyl ring or an oxo-substituted azacycloalkyl ring; p and q independently represent an integer from 0 to 3; m and n independently represent an integer of 1 or 2; Ar1 represents a naphthyl or bicyclic heteroaryl group each of which may be optionally substituted, wherein Ar1 is attached to the sulphonyl moiety via a carbon atom; Ar2 repre