Last episode of the series.
Several of the locations used are in regular use by residents of the Thamesmead region of S. East London. Many of the streets are identified by their actual names, making the routes used between scenes trackable via various maps. The clinic 'Mayside', was a fiction created in 2 locations, the exterior scenes beside the lake were originally the site of an active Nightclub that was regularly publicised via local newspapers.
In exterior scenes at fictional clinic 'Mayside', the background shows the lake busy with several sailboats. It makes it likely the local Thamesmead Boat club, were active upon the day of filming. Due streets filmed with Cherry Trees in full bloom, with clear skies it was filmed in April.