It's established that Marlene and Boycie were married in June 1968, but this episode depicts their apparent 20th anniversary which is impossible due to this being likely set in October 1986. This is based off of "Tea for Three's" September 21st setting according to the Peckham Archives and allowing for a couple weeks recovery time for Delboy and Rodney's facial injuries.
Mickey was making the "Night Nurse" movie himself to cut out the middle man (Boycie) and later Rodney said Boycie would not be pleased that Mickey was muscling in on his movie business. Yet when the movie is shown in the pub, Boycie introduces it.as if it's one of his movies.
After they leave the take-away, a boom mic visible when Del is getting ready to go out while Rodney is typing.