I have the leasehold of the upper flat in a house in Gaisford Street (1860s, in conservation area). Camden are undertaking external decoration and roof upgrade at the moment (after I spent two years chasing them to get it done). Back when the spec was signed off I asked if they could replace a bedroom window with a modern casement style window with a sash window in keeping with the rest of the building. I chased for three months, was repeatedly fobbed off and have just today been told it requires planning permission so they won’t do it during these works. I’d appreciate advice on who is the best contact at Camden to start the process of planning consent for replacing the window.