The trough ...

... at Sandhoe.  Not as well preserved as it was - the extra photo (not mine) is from the 1980s.  I think I am right in saying that the stonework comes from the original Beaufront Castle - that is certainly true of some of the houses in Sandhoe:
https://northumbrianlight.wordpress.com/2014/03/06/ancient/
(this post helpfully shows a wider view of the trough taken in March 2014)