Hi quick question, I am wondering if I need to have the timing belt removed in order to replace the water pump on a Vectra C 3.2 GSI 03 plate I've read a lot of reviews and had various responses. Can someone give me a definitive answer and if the timing belt doesn't have to be removed, is it still a big (Expensive) job to replace the water pump. I had my timing belt changed at 40,000 miles but never had the water pump changed. Is this something I should be doing at my next service. Mileage is 65,000

Appreciate anybodys help.