Tuesday, 31st January, 1978, was a very bleak and snowy night. Despite the weather, twins Helen and Rita Rytka were out working their patch by the railway arches on Great Northern Street in Huddersfield.

At 9.25 pm, Peter Sutcliffe was cruising the area when he spotted Helen on her way back to the place where she was due to rendezvous with her sister. For safety Helen and Rita would meet every twenty minutes by the public toilets.