True Oriental persimmons (Diospyros kaki) need a hot position in the UK, but can do well in good summers. They make small ornamental trees which do not require cross pollination. The American persimmons (D.virginiana) are much hardier but bear smaller fruits, and can become taller trees.
The hybrids here involve D.kaki and D.virginiana. The fruits are similar in size and quality to oriental persimmons but the trees are hardier and more reliable in a cool climate.
All self fertile but American persimmon NC-10 will fruit better with a pollinator (male or Morris Burton)
Persimmons dislike transplanting and will often leaf out very late spring the season after you’ve planted, so prepare to be patient!