Full-time: Harlequins 14 Gloucester 9. Gloucester went back top of the Guinness Premiership after claiming a losing bonus point at the Twickenham Stoop this afternoon.

The Cherry and Whites looked to be hanging on for victory – and would have become only the second team to win in the league at Harlequins this season – but wing Tom Williams try with four minutes left secured the spoils.

Gloucester hardly threatened the Quins line in the second half with their points this afternoon coming from three Olly Barkley penalties, two of them coming in the first half after Nick Evans had converted his own fine individual try to put Quins 7-0 up.

Quins made a change at the break, replacing Evans, who had orchestrated most of their attacking play, with the former Bath No 10 Chris Malone.

Gloucester were ahead for the first time in the match on 47 minutes when Barkley landed a long-range penalty.

The visitors should have been behind on 67 minutes but Malone failed to land a straightforward penalty after a Gloucester forward had showed referee Dave Pearson dissent.

The Cherry and Whites were let off the hook again six minutes later when Malone was off-target with a 40-metre penalty.

But Gloucester deserved not to concede the penalty after referee Pearson had incorrectly awarded Quins the kick 10 metres ahead of where Luke Narraway had been penalised for not rolling away from a tackle.

Having been forced to defend for most of the second half, the Gloucester defence was finally breached with four minutes left when wing Tom Williams darted over from close range. Malone converted to put the hosts five points in front.

Gloucester's forwards finished with a fantastic drive to claim back possession on the Quins five-metre line to give the visitors one last chance.

But scrum-half Rory Lawson's pass from the base of the resulting scrum was poor and the opportunity was lost when Charlie Sharples was forced into touch with 11 seconds left on the countdown clock.

Quins won the resulting line-out and kicked the ball out to end the match victorious.