KARACHI (Reuters) The Pakistan Cricket Board (PCB) is considering legal action against England batsman Jonathan Trott after his clash with Pakistani bowler Wahab Riaz before the fourth one-day international at Lords, a board source said Friday.PCB chairman Ijaz Butt had conferred with his legal team over the possibility of filing legal action against Trott for allegedly calling Riaz a match fixer while the two teams were warming up in the nets, the source said. The two players scuffled and had to appear before the match referee over the incident, with Trott apologising to Riaz. There is a strong likelihood that the PCB, in a tit-for-tat response to the threat by the England and Wales Cricket Board (ECB) to sue Butt over his remarks against English players, will go after Trott, the source said.