Bath is full of Georgian townhouses, and the windows in them are not normal windows. They are tall, often very tall, with thin glazing bars and sash mechanisms that were built when George III was still alive. Putting modern curtains on them is one of the most common mistakes I see when I walk through houses for the first time.
A Georgian window wants a curtain that lets it breathe at the top, falls properly past the sill to the floor, and weighs the right amount so the sash can still go up. Heavy modern linings make the window unusable. I have rehung curtains in three houses this year where the previous maker did not understand the building. The curtains looked beautiful and rendered the windows half-broken.