Blind2go Atom double roller blind (SE13)

https://www.blinds-2go.co.uk/roller-blinds/22631/double-roller-jet.html

Sent twist 2 go fittings rather than brackets. The first picture is of the bracket version which we have installed. The ones being given away are the same size but with a different fitting.
2 rolls per blind. 2x wide ones and 1x long one
Size is bespoke but maybe the fabric can be reused or the length adjusted