The record of the National Fruit Collection, at Brogdale in Kent, describes it1:
Originated in England. It was recorded in 1799. Fruits have soft flesh with a subacid flavour.
Sources
Hollandbury (accession 2000 - 048), National Fruit Collection, Brogdale, Kent (Defra).
Supports: the description quoted; the use; the fruit's size, shape and colours and the flesh, from the collection's characterisation; the picking time at Brogdale (early september); the other names.