You don’t need to go all the way to the Himalayas to see plants under stress from high light levels, particularly early in the year.  Enjoying the first really warm sunny afternoon in my allotment today I noticed the bright red leaves of some of the tiny willowherbs I was attempting to get rid of.

Basal rosette of Broad-leaved Willowherb, Epilobium montanum

You’d pay good money for such prettily coloured spring leaves in a Pieris!