My first sardonic thought is 'couldn't get rights for the Cushing movies?'
Doctor Who
A good old fashioned Doctor Who Community
This actually led to a scene being cut from the 50th anniversary special! For those who don't know the story:
In his novelization of the 50th anniversary special, “The Day of the Doctor,” he added an exchange in the UNIT Black Archives between Kate Stewart and Clara Oswald that puts the movies in canon, kind of. According to Radio Times, the Doctor (presumably the First Doctor) allowed movies based on his adventures to be made in the mid-60s, and he became friends with Cushing. They were such good friends he took the aging actor to the future, well after the time of his death, to appear in a movie, a nod to Cushing’s CGI resurrection in Rogue One.
Moffat has mentioned he wanted this scene to be in the original TV special of “The Day of the Doctor,” but the BBC couldn’t, amazingly, secure the rights to the posters for the two Dalek movies.
That's Terry Nation's rottweiler lawyers for you... I think they were seen in the background of some BT adverts with the annoying flatmate if anyone is sad like me and remembers those
The new version of The Daleks will air on BBC Four on Thursday 23rd November
Looking forward to it!