Where Paul is waiting for Julz as she finishes work, as she comes round the corner there is an EE (Everything Everywhere) store visible behind her. EE didn't exist at this time.
In an establishing aerial shot captioned "Port Talbot 1985", the M4 Briton Ferry Viaduct elevated section can be seen. This section of the M4 motorway was not completed until 1993.
When saying goodbye to Julz after their first date, Paul sees her to the Cardiff train and waves her goodbye. They are in fact on the Swansea bound platform of Port Talbot Parkway and she is going in completely the wrong direction.