During this time they are believed to have killed sixteen people in England including Ross McWhirter, who had offered a £50,000 reward for their arrest, and Gordon Hamilton-Fairley.
Selama periode ini, mereka dipercaya telah membunuh enam belas orang di Inggris termasuk Ross McWhirter, yang menawarkan bayaran untuk penangkapan mereka, serta Gordon Hamilton-Fairley.