In the village of Bursledon where I grew up, the local hero was Charlie May. I can remember him riding in Grass Tracks, Speedway, and even a Motorcycle Gymkhana.
Charlie rode for Wembley in 1946 and 1947. It was Birmingham in 1948, and then for 1949 and 1950 he was back in London, this time for Wathamstow
He rode for Southampton in 1951. After only 7 matches Southampton closed and Charlie moved to Cardiff until 1953 when Cardiff closed after 12 matches. He then moved to Exeter for the rest of the season.
It was back to Southampton from 1954 until 1956 when he retired mid season.
I hope these details are correct, they are taken from "British Speedway Leagues 1946 - 1964" by Peter Morrish