In article ,
Chris Hogg wrote:

If they've just finished flowering, it sounds as if they were a
variety of Irish heath, Erica erigena (older names: E. mediterranea,
E. hibernica), or possibly a variety of Erica x darlyensis (E. erigena
x E. carnea).

Heathers should be trimmed after flowering.... etc

Fantastic answer - very useful Chris: thank you!

John