POLICE need witnesses after a sexual assault was reported to have taken place next to Bank Quay train station.

The incident happened last Tuesday at 8.30pm when a 31-year-old St Helens woman said she had been attacked in an alleyway off White Street.

She described her attacker as a 23-year-old man, around 6ft 6ins tall of thin build and dressed in a black tracksuit.

Officers want to speak to anyone approached by a woman on the station platform at around 9pm.

The Llandudno to Manchester train and a St Helens-bound train passed through around that time.

Anyone with information can call police on 101 quoting incident 823 of January 24.