Have worked most shift patterns out there at some time or other with 5 night (sunday - thurs) being the worst, closely followed by 7 on 4 off, 7 on 3 off. Then there are the operators who have no pattern only a roster which can be O.K one week and dreadfull for two or three. 4 on 4 off almost as knackering as the 7s pattern but the best I have worked is at present 4 on 3 off mon to thurs every week (rotating earlies and lates 06.30-16.30 and 11.30-21.30) we also get £2500 ish shift pay for a completelt sociable shift !! long may it continue.