At the front side, “littlewoods” has become attached to the URL.
Inside WordPress it isn’t. The url is as it should be: https://nationalhomeimprovements.co.uk/home-appliances.
It appears to be grabbing or (is stuck) “littlewoods” from somewhere, perhaps the deleted duplicate post.
Any help is very much appreciated.
I found a redirect in Yeost (eventually) that was causing a page to redirect to a post. Once I had removed all involved they went back to working as expected.
Thank you for your help David.