By the time this episode was written it had already been revealed that the show would be going off the air and the final two episodes were planned out in advance.
The shot of Edina & Patsy was flimed on a real garbage boat going through London. They had to film it at 6AM as garbage boats aren't allowed through the city during business hours.
Despite the fact that there's no rain, the car that pulls up to pick up Patsy & Eddie is covered in water. Are we to believe that it was being washed before it picked them up?
Why would they leave Eddy's microphone on while Ping is talking?