Gosh! That's a bit of plumber's nightmare Mick! That is horrific. My OCD has gone ballistic

I trust you've done it all properly now? If not, let me know and I'll be happy to help you do so, you know my plumbing skills
I had a related adventure today... After spending a lovely morning with Autumn at soft play, I then attended to her mum's broken washer/drier... A posh Samsung job.
Error message: Blocked filter...
Autumn's dad had already checked the filter and dragged one of Autumn's socks out of it but that did not fix it...
Long, messy story short, I found the drain pipe clogged along all its length with soggy fluff and the impellers in both the main and condensate drain pumps jammed solid with lumpy fluff and other debris, including an elastic bands...
Happily, Samsung make the pumps easy to dismantle and clean - whether deliberately or not I don't know but I'm quite impressed with the build quality and fixability of the machine... The pump assembly was quite easy to remove and reinstall in the machine.
All the fluff gathering in the pumps and drain pipework do make me wonder if condensing washer/driers are such a good idea. All the fluff is what you'd find in a conventional tumble drier filter but when it's wet its pump and pipe clogging potential is considerable... Looks like I may have landed myself a regular maintenance job now!