Several English clubs, including Portsmouth, are monitoring Rangers prospect Leon King. The player is expected to leave Ibrox this summer, with a move south of the border considered increasingly likely. The Scotland youth international is also being watched by Middlesbrough and West Brom, while the relegated Premier League duo of Wolves and Burnley have conducted extensive checks. It is also understood that Championship winners Coventry City are interested in the defender. A cross-border transfer would only require minimum compensation, making King an appealing low-cost opportunity for interested clubs.