OK yes please to the sketch you have would be great to visually get your system. Thanks.
As the niegbour is an elderly council tenant, one day, all that will be removed back to level.
But I'm tempted to ask them if I can go and dig it out and just bag it up and leave it there neat for that time.
I like the idea of making up the entire rear timber wall ( as it has to be insulated later anyway and needs to be 95 mm deep timbers plus external covering - what do you recommend as the skinnest final sheeting to use under the breather membrane)?
im gonna have the rear wall slightly stepped off for ventilation from both sides. but I will fix the top roof timber flush to the wall to just under the existing tile coarse as its dry as a bone up there and it acts well to move any rain waters away from the soldier coarse etc on the roof. (proberbly just below it, a bevelled 2 x 2 rip along the whole length prior to coverings).
As you may see in the images, the rear wall is about 15 degrees off perpendicular to the both fences.
It also has a staggerd build with an old hollow steel stanchion inset tight in the middle left - see sketch, (which in a dreamy way would make a great chimney) but its too tight and can't be insulated)
Anyway,
I will maintenance the angle as every mm counts in this small urban 4 x 10 garden.
A fella told me, if there is not a single brick or block layed in the structure, then you do not need planning permission and just wait around 4 years before you declare the structure existence in situ and all will then accepted.( I might be slightly off here with the dodge)
Is this just tosh?
Thanks all.