Just as long as Avon don't try the silly idea they originally spouted of using the helicopter to replace 5 or six road based rescue tenders.
A helicopter has a potential role in some rapid response scenarios, however, it's availability (daylight / weather / serviceability) will only ever allow it to be complimentary to ground based units.
As someone who knows quite a lot about helicopters and a fair bit about fire-fighting too - i can't see the numbers adding up unless you use it to replace ground units - and you can't do that with the level of availability and reliability that you need.
OH