NEWCASTLE Falcons prop Robbie Morris has urged his team-mates to iron out their inconsistencies ahead of tomorrow's European Challenge Cup semi-final with London Irish.

Last weekend's 32-21 victory over Premiership leaders Sale Sharks underlined the potential within a Falcons squad that has under-performed far too often this season.

Rob Andrew's side have won seven out of seven in the second tier of European competition this term, but many of their most impressive displays have been followed by a setback on the domestic stage.

This time, the tables have been turned and, after outplaying the Premiership favourites at Kingston Park, a confident Falcons are looking to reach their first European final by banishing the Exiles from the competition.

"We know we can beat anyone," said Morris, who has scored three tries in Newcastle's surge to the semi-finals. "It's just a question of sorting ourselves out and making sure we do it consistently.

"We've had some good wins this season, but we've come back with some pretty pathetic performances the following week.

"You can see it annoys the fans and it's the same for the players, I assure you. Everyone is aware of the problem and there has been a massive focus on this game.

"Sunday was one of our better performances, especially in the second half. Having done the hard work in the forwards, we finally ground them down and got the ball wide to the backs, who did a lot of the damage. It was good to play a bit of rugby and score some tries.

"But now we've secured our Premiership future, we need to make sure we don't sit back and take our foot off the gas. We have to go all-out for the European Challenge Cup."

Winning the trophy would ensure a return to next season's Heineken Cup. Last year, the Falcons made the quarter-finals of Europe's premier club event before crashing to a heavy defeat against Stade Francais.

The visit to the Parc des Princes marked the highlight of Newcastle's season and Morris is especially eager to rub shoulders with the European elite once again.

"It's a massive game for the club because it's an opportunity to go to a European final, and Heineken Cup rugby is at stake," he said.

"From a squad point of view, that's the competition that everyone wants to play in and, from the club's position, the financial benefits are obviously a major attraction as well."

Andrew has made four changes to the side that beat Sale. Andy Perry is set to replace Luke Gross, although the second rower faces a fitness test on his injured shoulder, as does fellow lock Geoff Parling.

Ben Woods replaces Cory Harris at openside flanker while, in the backs, Jamie Noon comes in for the injured Mark Mayerhofler at inside centre and Dave Walder starts for Toby Flood at fly half.

Jonny Wilkinson is back on the bench after an impressive second-half cameo against Sale and the England number ten is expected to come on at half-time as the Falcons look overhaul a London Irish side currently riding high in third place in the league.

"Jonny's a fantastic player, you don't need me to tell you that, and it was obvious for everyone watching that he really drove our attack when he came on (last weekend)," added Morris.

"He can make passes that most players can't execute, he draws defenders towards him and then he frees up space for other people, so it's nice to have him back.

"Hopefully, he can stay fit and it bodes well for the few games we have left this year and the whole of next season if we have him with us on a regular basis."