Hurl

The upstairs bathroom sink has not been draining well. Today it stopped draining at all. Plunging made no difference.
Removed the trap, cleaned it out. Still blocked.
Removed the pipe that leads out of the bathroom and cleaned that. Still blocked.
Disassembled the pipes that run through the loft to the down pipe. Oh my god. Nearly lost my lunch. Cleaned those.
Reassembled everything. Water running freely.
Put all clothes in the washing machine and stood in a very hot shower for 15 minutes.