We had a sash window draught proofing job on Saturday. The tenant let us in and showed us the troublesome windows. She had been complaining to the landlord for weeks that cold draught was whistling through the windows and that the flat was impossible to keep warm.
On inspection we found multiple problems with the windows, in fact the top sashes were painted shut and hadn't moved in decades. We called the landlord and explained that we could just do our normal draught proofing service, which would cure the draught problem, or we could carry out additional repairs to get all the sash windows operating as well as draught proof.
His response was clear. 'I just want the complaining to stop, so just do the draught proofing'.
So this is what we did. Five hours later all three sash windows had been thoroughly draught proofed. The tenant was happy and the landlord was happy.