@phil_hg_uk
I have a garden bench like the one in the top picture. This afternoon while
in the
I was trying to work out if it could be temporarily made into a miniature green house, by putting some slats of wood across the arms of the bench. Then I noticed the wooden structure in the foreground of the bottom picture. Did you make that (from a dismantled shed) or buy it? It seems like it doubles up as a workstand for potting up plants, and also providing shelter for plants on the lower levels.
I am guessing that your garden is more sheltered that my garden. In yesterday's wind any lightweight green houses in this garden would have been blown away by the gusts of wind, and landed perhaps fifty yards away on the conservatory roof of the house two doors down the street.