That said now I think about it, an ordinary step ladder can be placed diagonally, kind of straddling the toilet, that's normally allowed me to get close enough to the wall etc.
I am considerably more than 68kg unfortunately. :( :p
I too would not stand on a toilet, something like this that fits would do.
Or you could knock one up out of some spare timber. Google 'hop up work platform'.
I'm not sure it sets any precedent, AFAIK there are various appeals which have gone either way. So like it seems to depend on which side of the bed the planners get out of it also depends which side of the bed the planning inspector gets out.
Probably a new roof from the middle back, leaving all of the existing rafters in place, so a pitched roof all round as you have now but with a flat roof in the middle.
Is this an external wall? What koolpc is getting at is are there any ceiling joists bearing onto it, which way do the ceiling joists run? Perhaps take some pics of the top of the wall in the loft for us and take a pic or two from further away so we can see things in context.
You need to check what the guidance was that was in place when that application was approved. In anycase precedent doesn't really exist nowadays in planning (especially for domestic extensions) just because something was approved previously does not mean the council are bound to approve the same...
For Prior Approval yes provided they don't object.
For planning Permission yes provided the Local Plan guidance hasn't changed to the detriment in the meantime.
So ignore my last comment about joining the garage, if you read it, going by your drawing you're obviously keeping a gap between the extension and the garage.
Presumably your new extension is joining an existing one?
If you can live with 6m deep overall (and the heights are limited as per the...