worcester 230 combi boiler?

Assuming it's the usual Worcester type,
the pump will be a Grundfos 15-60

Grundfos 15-60 somewhere around £70-80
Worcester 'branded' 15-60 around £110-140

Change the pump head with a Grundfos standard pump, much cheaper, same pump without the brand name.

Carefree
December 2010