dishwasher water heater spare IRCA 3025 AC 230V 2100W 773R (Kennington SW8)

I got this years ago for an aeg, but it turned out not to be the problem.
It doesn't look like I'll ever use it...
It's quite a common type. This ebay listing has a list of manufacturer/model - https://www.ebay.co.uk/itm/200316682478