Thanks, that's helpful - I've found the 'McAlpine 110mm 90° Space Saving Bend Adjustable Length Rigid WC Connector' which I thought would be ideal. I emailed them though and they said it couldn't be used horizontally, but I don't see why not - do you think that would be ok?
Thanks!
I'm hoping to move a toilet about 1m further along the same outside wall.
Unfortunately the place where the waste would ideally go through the outside wall is right in the middle of a brick arch (over the window downstairs) and I'm keen not to drill a big hole in it.
Is it sensible to have a...