The 29-year-old was recalled as a replacement for injured back-row forward Colin Charvis and is set to be given the honour of leading Wales out.

Martyn is one of the leaders, one of the senior guys, said Toulouse star Thomas. I played in the same team as him when he won his first cap.

He is one of those guys who has been here consistently throughout the tough times, and hes been one of the ones that has really dug in there.

Its a great occasion to win your 50th cap, and he really deserves it. I hope the crowd on Saturday give him the reaction and support he has really earned.

Williams, who has made a quicker-than-expected recovery from a disc problem in his neck, will pack down alongside Dafydd Jones and Michael Owen as Wales look for their first victory over England in Six Nations history.

Englands injury problems - no Jonny Wilkinson, Mike Tindall, Will Greenwood, Stuart Abbott, Richard Hill or Martin Corry - have increased expectation among Welsh supporters of an overdue home win.

However, Wales coach Mike Ruddock has been quick to inject a dose of reality.

I dont think England will be vulnerable, he said.

They beat South Africa in the autumn, we couldnt do that, theyve got a great coaching set-up and they only just lost to Australia in their last game.

They are a very powerful team with a lot of very good combinations and a lot of good balance about them.

Its going to be difficult for us, but we are all up for it big time and looking forward to it.

The midfield battle between Englands Jamie Noon and teenager Mathew Tait and the Welsh duo of Gavin Henson and Tom Shanklin promises to be a highlight.

Henson insists his long-standing groin problem will not restrict him in a game where much is expected of him.

I have been on anti-inflammatories every day, Ive been cut down to one training session a day, and it is feeling all right, he said.

Ive felt it for the last six or eight weeks, a gradual thing that got worse, but it was nice having the weekend off and it feels fine now.

I dont mind being a marked man because hopefully by attracting players on to me it creates space for others. Thats what normally happens, so it should make it easier.