Hoover Washing Machine Model HNL6166 - Deafening on Spin cycle?

We have noticed over the last week that our Washing machine has got louder as it spins. It is now so loud it is unbearable. When there is nothing in the machine and I rotate it by hand it doesn't sound right either. The wash cycles appear to be fine, but the spin is deafening. The machine itself is about 2-3 years old and we have had no problems previously. I've cleaned out the water filter to date and I'm gonna have a look at one or two other things. Not sure what at the moment though.
Cheers for any help provided. Thanks
CM