Wasps survived a difficult trip to Pontypridd to book their place in the final of the Parker Pen Challenge Cup.

The Zurich Premiership club, who have been in great form since the turn of the year, ran in three tries to set up an all-English final against the winners of Saturday's second semi-final between Bath and Saracens.

With Wasps boasting a 15-point advantage from the first leg, it was up to Pontypridd to make the running.

And when Gareth Wyatt chipped the ball over Kenny Logan and then Josh Lewsey before catching and driving over for a try inside three minutes, a healthy crowd of more than 6500 wondered whether the Welshmen could overturn the deficit.

However, if nothing else, it served as a timely reminder to Wasps that they still had a tie to win.

And the visitors responded quickly when flanker Joe Worsley was driven over from a five-metre line-out.

Alex King improved matters with the conversion and as Wasps took control, the fly-half added a penalty to extend the overall advantage.

An inch-perfect punt ahead from King on 19 minutes gave Lewsey enough space in which to catch and cross unopposed.

Five minutes later lock Simon Shaw popped up on the right flank to score, despite the attention of three Pontypridd tacklers.

King converted and though Brett Davey replied with a penalty and Ceri Sweeney with a try in first half-injury time when Wasps prop Craig Dowd was in the sin-bin, it was never likely to affect the overall outcome.

The second half was a touch tame in comparison to the opening period, with King adding a penalty 10 minutes from time for good measure.

However, by that time Wasps had done their job.

Pontypridd kept battling to the end, but their biggest concern was the arm injury to Wales international centre Sonny Parker, which could keep him out of the summer tour to New Zealand and Australia.