LV County Championship game zone Old Trafford Lancashire are again missing their all-rounder Luke Procter because of a side strain and the former England paceman Sajid Mahmood is still languishing in the county's second team. Worcestershire, placed second from bottom in Division One, have dropped left-arm seamer David Lucas but added slow left-armer Shaaiq Choudry to the side that played out a rain-wrecked draw with Durham at New Road last week. Trent Bridge Nottinghamshire are expected to keep faith with the side that drew with Middlesex with fit-again seamer Darren Pattinson kept back for the Friends Life t20 quarter-final against Hampshire next week. Surrey, who have targeted Worcestershire batsman Vikram Solanki as a possible recruit for next season, have included Matthew Spriegel in a 13-man squad as the likely replacement for England's Kevin Pietersen. Somerset v Warwickshire Taunton Marcus Trescothick is testing out his ankle injury in Somerset's second team. George Dockrell is with Ireland and the Overton twins, Jamie and Craig, with England Under-19s. Steve Kirby is doubtful with a thigh injury. Former Surrey batsman Laurie Evans will make his first championship appearance of the season for Warwickshire as replacement for Ian Bell. Ian Westwood returns for William Porterfield, who is on Ireland duty. Sussex v Durham Arundel Sussex recall Ben Brown for Matt Prior, who is on England Test duty. Joe Gatting or Kirk Wernars will replace Ed Joyce, who is playing for Ireland in the first of three Twenty20 games against Bangladesh. Durham expect Paul Collingwood to captain them having recovered from a broken hand. Graham Onions is on England duty but off-spinner Gareth Breese and seamer Mark Wood are in line for their seasonal championship debuts. Division Two: Derby v Yorkshire Chesterfield Derbyshire include Warwickshire wicketkeeper Richard Johnson who has joined on a month's loan to cover for Tom Poynton, who has an abdominal muscle injury. Ross Whiteley is also injured and will be replaced by either Chesney Hughes or Mark Turner. Yorkshire have added leg-spinner Adil Rashid to the side that drew with Hampshire last week. Captain Andrew Gale is still sidelined by a hip injury. Gloucs v Leicestershire Cheltenham College Gloucestershire are without an overseas player, as Ed Cowan is on Australia A duty and Rob Nichol is with New Zealand in the West Indies. Off-spinner Jack Taylor is added to the squad. Former Kent wicketkeeper Paul Dixey is in line for his first championship appearance of the season for Leicestershire. Wayne White returns from a two-game ban for internal disciplinary reasons. All matches start 11am on Wednesday.