Saxman wrote:
Has anybody got any effective ideas as to how one can get rid of green
mould on greenhouses/conservatories and to help prevent its
re-occurence?

I do use a pressure washer, but still have to use it about a couple of
times a year.

It's not 'green mould' it's algy - a plant, and it grows in damp and usually
shady areas, you can clean it off as many times as you like but it will
always grow back, unless you canb keep the greenhouse or conservatory A)
dry, and B) in full sun 365 days per year.
I'll wager that you can do neither so you're stuck with it.