I’m almost certain I replaced the drain pump as I bought it from a listing on eBay for a drain pump:
https://www.ebay.co.uk/itm/fits-LG-WM14225FD-Washing-Machine-DRAIN-PUMP-Spares-Parts/191310176224?ssPageName=STRK{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}3AMEBIDX{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}3AIT&_trksid=p2057872.m2749.l2649
So the other one presumably isn’t involved in draining and therefore isn’t my problem.
Seemingly the PCB is obsolete now so I’m waiting for a second hand one on eBay.
Would the PCB from a WM-12225FD work? Seems to have a slower top spedd than mine…