Who is Guy Mollison from Playing for the Ashes and what is their importance?

Guy Mollison is the official captain of England's cricket team. He once had an affair with Gabriella Patten, and shortly before Kenneth's death, Mollison tells him of his own affair with Gabriella. This information is directly connected to Kenneth's confrontation with Gabriella at Celandine Cottage, where he will later die from carbon monoxide poisoning.