 Ken and Susan split up in 1961, shortly after they took part in a "Ban the Bomb" protest, as they felt that their backgrounds were too different.Some time later, Susan discovered that she was pregnant and wrote to him, asking if he wanted to try again with their relationship, but the letter was misplaced and Ken did not read it or become aware of its existence.Her son, Lawrence Cunningham (Linus Roache), was born later that year.