Wages include a 9% element for working unsocial hours, though less than 60% of policemen actually work them.

ECONOMIST: Police pay

Overtime and unsocial hours payments will also be cut to time-plus-30% while work on negotiations on new work rotas and other changes by September 2011 is to continue.

BBC: Dustbin lorry worker

MPs work notoriously unsocial hours.

ECONOMIST: The babes�� babes