As several people have said: it was Greer who conceded the penalty. Others have also attributed it to Lee Mason. It was one of those two, but neither Dunk nor Bruno.
This was covered earlier this week. Wilson did say that there was a recall option, and someone even quoted the loan rules for youth players (which Wilson was, aged 20, at the point the loan started) which stated that the recall option can be exercised after a month or 28 days (can't remember...