Leaded Bay Insulation

[cyclesilly]

I live in a Victorian semi, with a tall leaded bay window, I know there is no insulation above the ceiling and am losing heat, proven by thermal imaging. How can I insulate this area based that the ceiling can't be removed due to intricate cornice and neither can the roof due to its age and therefore brittleness. thanks in advance

[stoneyboy]

cyclesilly,
Your only practical solution is to go through the roof.
end