SK 3386 05 April 2022: 3 very high res. images.
Habit : Cultivated
Initially I thought Rhododendron….. but leaves are very wrong.
I believe it is a Ceanothus showing the developing flowers
Yes, some cultivar as per
https://www.rhs.org.uk/plants/63246/ceanothus-blue-mound/details
http://apps.rhs.org.uk/planttrials/TrialReports/Ceanothus%202004-2007.pdf