How to remove the drain pump of a WDT1085 washer/dryer?

The drain pump of this machine just was not working, the timer wax clicking but on inspection was discovered several small coins, various stones and 2 thin plastic covers 1.11/16” in diameter with 6 diametrically indentations and a small hole in the centre which I suspect look like a type of bearing seals however unable to remove pump which seem to being help by white plastic lugs, can anyone tell me how to remove this pump so I can possibly replace it

David Peverley
July 2019