So, after a frustrating morning of taking the machine to pieces and searching countless numbers of images, I admit defeat.
Last night the ‘check water’ light came on. This morning I have finally managed to remove the lid and the side panel. The water inlet has some debris trapped in part of it and I want to be able to remove it for cleaning. The inlet is very clearly attached to the machine by the circular inlet/outlet(?) in the centre. Is there any way to remove this? My brute force and ignorance technique is likely to require a new dishwasher…