Available now at RTS, The Anthracite Collection

https://www.replacementtoiletseats.co.uk/ourshop/cat_1785937-Anthracite-Collection.html

Our anthracite seats are made of high quality Duroplast featuring slow close and quick release hinges.  Suitable for close-coupled, back to wall and wall hung toilets that do not have access underneath.  All fittings included.