The recalled Hugo Southwell had earlier scored a fine try and Wasps were struggling to dent the visiting defence.

But Dave Walder's try, four penalties and a conversion saw Ian McGeechan's side to a 19-11 victory.

Robinson said: "I thought at 8-7 if we came out and played with a bit of tempo and held onto the ball in attack we might have asked some questions of them.

"There was a lack of skill at times. We could execute our first-phase plays and we needed to do that to put Wasps under pressure.

"We scored one good try with a great line from Ben Cairns, which I was really pleased with, but we never threatened after that and our accuracy wasn't good enough."