A provisional list of 30 will be trimmed, and up to four places could be up for grabs after England's dismal showing in the NatWest Series.

England failed to make the final of the triangular event, with all-rounders Rikki Clarke, Anthony McGrath and Ian Blackwell failing to impress.

Ian Bell, Mike Powell and Alex Wharf are queuing up for their spots.

The disappointment of making way for New Zealand and West Indies -- both of whom England have dominated in Test cricket -- prompted calls for a shake-up.

The skeleton of England's one-day side looks solid, and as many as 10 players can be seen as banker selections.

But impressive county form has thrust the likes of Warwickshire's Bell, Glamorgan duo Powell and Wharf and Lancashire's Sajid Mahmood into the picture.

Bell has been in intimidating touch for the Bears this county championship campaign, averaging 85 with the bat and gaining some unprecedented success with the ball.

His National League exploits have not been so remarkable, but he could benefit from England's stated policy of easing talent into the international cricket via the one-day side.

It worked for Andrew Strauss, and Rob Key was given a spin in the NatWest Series before resuming his Test career in explosive fashion with a double-century at Edgbaston.

A figure no less than Alec Stewart plugged bowling all-rounder Wharf's claims last month, while Powell has already publicly aired his aim to break into the England fold.

Powell, 27, was called into the NatWest Series squad after injury threatened Marcus Trescothick's involvement, and his time could be nigh.

The impression is that McGrath, Clarke and Blackwell have not grasped their chances, and if any of that trio make the final cut they could be on borrowed time to make an impact.

Of the seamers, Simon Jones returned to form for Glamorgan this week but can be expensive and is uncapped at one-day level.

Mahmood is interesting -- despite misfiring on debut against New Zealand in the NatWest Series -- as he can swing the bat.

Selectors could be tempted to take a chance on the raw 22-year-old fast bowler, with surefire selection Steve Harmison's form of slight concern and Matthew Hoggard incongruously out of favour in the shorter game.