I'm in the process of tracking down a number of SF books/TV shows/films I saw or read as a child. Today I'm hunting for a science-fiction/horror film that would have been made in the early or mid-1970's.
The plot is about a man who is visiting a psychiatrist. It turns out he has psychic powers. There is a scene in which he causes an airliner to crash onto London (where the film is set). The final scene shows him bandaged and in a hospital bed. He writes the word "Windscale" (this is a nuclear reprocessing plant in the North of England) on a notepad, indicating he will destroy it.
I had thought it was The Omega Factor but this turns out to be a TV show, so clearly I'm misremembering.