Cheers Scruff - They would have been a tickle cheaper (60p).
This was the bay listing:
https://www.ebay.co.uk/itm/VAILLANT-ECOTEC-PLUS-637-837-937-BOILER-PUMP-00200250...This is yours:
https://www.dhsspares.co.uk/product/vaillant-0020025042-pump-vaillant-0-1379938Ebay: £149.22 inc delivery.
DHS Spares : £148.62 inc delivery.
I think my pump in the boiler was faulty from the off. The boiler has always been noticeable when on, it would wake me up at 05:30 before my alarm clock. Recently it started making horrible noises, so bit the bullet and replaced it (I did think of new boiler, as current one is 11 years, which has flown by!). With the new pump, the whole system is so much quieter, and I sleep in until the alarm clock!
Quicker heat up time, silent rads, and if I am not mistaken, less tinking as the copper pipes expand??
Blissful
Wish I had done it years ago!