THINGS I WANT FROM BBC GHOSTS: THE POSSESSION OF BUTTON HOUSE
Alison and Mike visit the ghosts to catch up with them (at the end of the film?)
Party Conference is held at the hotel, attended by Julian's daughter (Julian has a SLIGHT posthumous change in beliefs after seeing his daughter's speech but not entirely because it's still Julian)
Mia can see Ghosts!!!! Pat and Kitty are her favourite because they play with her (she calls Lady B her grandma one day and she tears up and hesitates to correct her)
Caphavers reunion (I don't know how they'd pull that off) OR Alison tells The Captain about how on her travels, she met a nice ghost called Anthony who also was stationed at Button House and knew of The Captain
The bear stays on the stairs and still scares
A queer couple called Teddy/Theodore and Will/William stay at the hotel. The Captain follows them round for the whole day. IF YOU KNOW, YOU KNOW (PLEASE Ben do it for all the OG Caphavers fans)
Mary and Annie referenced!
The ghosts figure out how to possess the guests, or possibly one of them in particular. Maybe Thomas manages to possess a guy so he can flirt with a girl, like in CBS Ghosts?
Either Sam and Jay or Pete make an appearance from CBS Ghosts
Captain and Kitty father and son dynamic
Humphrey's head stays on him for at LEAST a quarter of the film (a big ask, I know)
Hotel radio, feat PAT BUTCHER, THE GREATEST DJ IN THE AR-E-AAAAA (and co host Thomas Thorne)
Kitty is obsessed with Spiderman after watching the films when they were playing in a guest's room once
Julian has genuinely befriended some of the Basement Ghosts
Barclay comes to visit Alison and Mike who are visiting the hotel for afternoon tea whilst the ghosts are rapidly updating Alison on all of the Barclay drama that they've heard from the workers
Robin's multilingual skills help the ghosts to uncover the secrets of a guest
References to Horrible Histories ("Ah yes, my good friend Blinkensop. Awful soldier, but a fine fellow in cricket and football", or Pat 'haunting' someone who can see ghosts by shouting "HI, I'M A SHOUTY MAN!")
Cliffhanger that alludes to one of the ghosts being "sucked off" but it's open ended and we never find out which (up to audience interpretation who it is)