Chris Hogg wrote:
Heathers are usually trimmed shortly after flowering, to cut off the
old flower heads and keep the plants compact. Use shears; quicker than
secateurs. New growth then comes from below what was the flower spike.
But I see no problem with trimming them now. It might mean that this
year's flowers are a bit late, but it won't be a disaster, and trim
them again in the Autumn, after the flowers have died.

Thanks, Chris.

I'm inclined to trim them in order to give them smooth flattish tops.
(I don't want to trim their width.)

If I just shear them in order to make them pleasant to look at, is that
OK? Of is there a recommended place to cut?

Eddy.