Just to follow up what Retty said for you 716,
Training will be a big issue, you won't (99% sure) be able to just get straight in and ride the big red thing. They won't assume you know it all, and you will probably have to begin the training from square 1.
The full process in Derbyshire (sorry it's not Suffolk, but I can only talk about what I know) takes approx. 5 months start to finish. Thats weekend courses fdone in order to help you maintain a regular job as well as training, with the odd few full weeks for BA training.
The way it used to be, was 1 full week of training, on basic hose running and ladder drills, then you can ride. No BA training until after a year. As I say, don't know how the area you are interested in do it (I'd be interested to finding out as I'm a nosy guy anyway).
Either way, thats a lot of commintment on your part, and training expenses for the fire service, meaning they will be wanting you to commit a lot of time and years to the service. They may even want you to make your self available for 12 hours a daytime 7 days a week, which obviousy not everyone can make.
Good luck if you do decide to go for it.