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... is a South African plant, and I think not hardy in Britain. The only spring-flowering heather native to the British Isles is Erica erigena, and that native only to parts of Ireland.
I'd suggest Erica carnea, Erica erigena, or their hybrid Erica x darleyensis.
Lat/Lng: 51.5, -3.2
OS grid ref: ST2381