The glass windows in the raised roof part are not tinted. Since they are higher up, I think that they could be subject to condensation. Therefore I decided to double-glaze them with an internal cover of polycarbonate panels.
I got those panels cut from HLN in Leeds, which have a wide variety of plastic parts. I chose 3mm thick polycarbonate, because it is soft and can be cut with a saw without it breaking. On each of the 5 roof windows I attached such a plastic sheet at the inside, fixing it with double-sided foam sticky tape. This tape can be best gotten from ALDI (once it is available again, is unfortunately only there on special sale). B&Q also has such tape, but at a quite expensive price (5 £ for a roll of 1.5 m).