Adaptations of R.F. Delderfield novels don't usually do well on TV. A few have been made only to disappear and never be seen again.
Diana (1985) starred the young Patsy Kensit but has hardly ever been seen since that first broadcast. It was based on his novels "There Was a Fair Maid" and "The Unjust Skies"
People Like Us (1977) was based on his "Avenue" series of novels, "The Dreaming Suburb" and "The Avenue Goes To War" but has hardly ever been seen after the first broadcast
A Horseman Riding By (1977) was based on his novels "Long Summer Day" and "Post of Honour" but has hardly ever been seen after the first broadcast
Come Home Charlie and Face Them (1990) was based on his novel of the same name but has hardly ever been seen after the first broadcast
And nobody has yet made an adaptation of my favourite Delderfield novels, the Swann saga. "God Is An Englishman", "Theirs Was The Kingdom" and "Give Us This Day.
His books are often mighty tomes but they're wonderfully written and I would have thought that they would lend themselves to films or TV series very well.
The only one of the TV adaptations of his work that does seem to get shown is To Serve Them All My Days (1980) with John Duttine and Frank Middlemass.
Some of the films made from his novels and stories have fared a bit better.
Like:
Where There's a Will (1955)
Carry on Sergeant (1958)
On the Fiddle (1961)
Steve