At lunch on the second day, England were 18 for no loss in reply, against what is effectively a second-string state team made up of fringe First-Class players, with Joe Root unbeaten on 12 and Michael Carberry three not out.
Every WA batsman reached 50 apart from Tom Triffitt, who was unbeaten on 18. Chris Lynn top-scored with 104.
England’s fringe pacemen failed to impress, with Boyd Rankin (one for 92) and Finn claiming a single wicket each, while Chris Tremlett finished with none for 88.
England are missing several key players for the three-day match, including captain Alastair Cook, who has a sore back, and Kevin Pietersen. Fast bowler Stuart Broad and spinner Graeme Swann were rested. Matt Prior is leading the team.