The faulty fan for Worcester 24CDi (original part number 87161200340) was replaced with 87161214560 which is priced between £80 - £120 was charged at £250 (twice the price). The issue was immediately identified as a bearing on the fan unit, the entire unit was replaced, which took the engineer 30 minutes in total. Including the 30 minutes he took to drive and collect the part, I should only have been charged for 1 hour. I was charged for 1.5 hours which was the time it took for the engineer to write up the bills etc. Would not recommend to others nor use the service myself ever again.