During the scene in the salon trying on the wigs, Robbie Williams was singing "Angels" on the radio, which wasn't released as a single until December 1997 (and the album "Life Thru A Lens" was released in September 1997).
When she is Hillsborough for the first time it must be around 1997. The car that pulls into the drive is a Ford Mondeo Mk 3 which was not produced until 2000.