Sean Pertwee makes his cameo as a favor to producer Jonathan Sothcott after having to drop out of Dead Cert at the last minute.
When the woman complains another that woman has collapsed inside the police station the cop with the moustache says "What do I look like a doctor"? Is a clever reference to the fact that the actor who plays the cop with the moustache Sean Pertwee is the son of Jon Pertwee who played the 3rd Doctor.