The home side went into the game as huge underdogs following their opening three defeats in the competition, but made Wales work hard for victory.

The hosts led 15-13 before substitute Tom Shanklin touched down eight minutes from time to send Wales on their way to their third victory of the tournament.

"When you are behind you go through certain scenarios in your head," said Gatland. "But a few questions were answered.

“I'm just happy we came out and we scored two tries and we go home with the win. We are still playing for the Triple Crown."

Gatland defended his decision to make wholesale changes to the team that lost 21-16 to France in Paris a fortnight ago but admitted his players struggled to adapt in the opening half.

"A few players hadn't played for a while together," he said. "There were lots of changes and different combinations.

"But for me it's great to be able to have the opportunity to make changes in a tournament game and to see where we are.

"We talked about trying to develop some depth in the squad and that is what we are doing. We have three wins from four games and I think we have shown some consistency in terms of results."

Gatland, however, admitted his team have room for improvement.

“The scrum didn't perform well and that put us under pressure," he said. "We tried to talk about it in the interval and we made some improvements.

"We have to learn to adjust to how our rivals approach games against us. Teams try to stop us playing our game and that is a sign of respect.

“I think we should have played more with our hands rather than our feet in the opening 25 minutes.”