Tons of Trouble

I remember watching this film on TV over 40 years ago. It's a touching tale, which reflected an innocence for the times. I loved it and kept the copy of Radio Times, where it was listed, for many years. Mr Pastry is a caretaker in charge of boilers in some establishment (school?)and has a little dog as a friend. Time has made the memory a little fuzzy, but the film was full of character actors such as William Hartnell (pre-Doctor Who days), Ronald Adam, John Stuart. I remember Mr Pastry riding his bike with the dog in a basket. It all turns out OK in the end when the boilers are saved from being dismantled. Can't remember much of the romantic interest - must have been my age! Great nostalgic stuff!