if you are a builder or plumber can you email me please or inbox here - possibility of a fair bit of paid work for you and I'd rather use someone from our little wam community who understands a sploshers needs
Not in the UK, but you should look into getting a clay trap for some of the drains in your castle. Pottery places tend to use them a lot to keep sediment and whatnot from collecting in their own drains, and I'll bet they could save you a lot of bother.