Steve Harmison's impressive performance against Australia this week has failed to earn him a place in England's squad for the first npower Ashes Test in Cardiff.

The 30-year-old Durham fast bowler claimed six wickets for England Lions during their drawn match against the tourists in Worcester, including the scalp of dangerous opener Phil Hughes in both innings.

But the selectors have decided not to include Harmison, whose fiery new ball burst at Lord's four years ago set the tone for England's stunning Ashes success, and have instead included Durham team-mate Graham Onions in a 13-man squad.

Onions claimed 10 wickets in the one-sided series win over West Indies earlier this summer and has been added to the England line-up who drew their practice match against Warwickshire last week while Ian Bell is included as cover for the batting.

"We were delighted with the way in which the team performed in the warm-up match at Edgbaston and it was very encouraging to see Andrew Flintoff bowl so well on his return to the side," enthused national selector Geoff Miller.

"We were keen to show consistency in selection and retain the nucleus of the side that performed so well against West Indies in the Test series earlier this summer.

"Graham Onions has made an excellent start to his Test career and gives us a different option when we consider the make-up of our bowling attack and the type of conditions we will encounter."

Yorkshire all-rounder Tim Bresnan has dropped out of the squad having featured for the first time against West Indies to accommodate the return of Flintoff, who has been recalled after missing the start of the season while he recovered from a knee operation. Left-arm spinner Monty Panesar also returns after missing the West Indies series.

England's squad for the opening npower Ashes Test against Australia, which starts in Cardiff on Wednesday: AJ Strauss (Middlesex, capt) Age 32 Tests 61, AN Cook (Essex) 24 43, RS Bopara (Essex) 24 6, KP Pietersen (Hampshire) 29 52, PD Collingwood (Durham) 33 48, MJ Prior (Sussex, wkt) 27 18, A Flintoff (Lancashire) 31 74, SCJ Broad (Nottinghamshire) 23 17, GP Swann (Nottinghamshire) 30 7, JM Anderson (Lancashire) 26 37, MS Panesar (Northamptonshire) 27 38, IR Bell (Warwickshire) 27 46, G Onions (Durham) 26 2.