Who created the characters 'Bill and Ben' for the British children's TV show the 'Flower Pot Men'?

The Flower Pot Men is a British children's programme, produced by BBC television, first transmitted in 1952, and repeated regularly for more than twenty years. The show was the basis for a comic strip of the same name in the children's magazine Robin. A reboot of the show called Bill and Ben was produced in 2001.

Originally, the programme was part of a BBC children's television series titled Watch with Mother, with a different programme each weekday, most of them involving string puppets. The Flower Pot Men was the story of Bill and Ben, two little men made of flower pots who lived at the bottom of an English suburban garden. The characters were devised by Hilda Brabban. She wrote the original stories of the three characters (Bill, Ben and Little Weed) and sold them to the BBC for one guinea each. The stories were originally broadcast on the radio programme Listen with Mother in 1951.