I've just deleted my post by mistake, so here it is in note form.

Plumber came to move a radiator and to service the boiler.
Said radiator turned out to be very rusty underneath, so I had a replacement rad instead.
Eventually I'll be able to replace that carpet.
Sausage sarnie with ketchup for lunch yum!
When the plumber had gone I went out for a big block walk. 3+ miles. Saw a long tailed tit in the hawthorn trees.

I've passed the trough in my extra loads of times over the last two years, but have never 'seen' it before. Ridiculous!