Things may have changed, but about a year or so ago they were advertising for similar vacancies and it was stated on this site that morale was at an all time low, experienced staff were leaving fasting than rats vacating sinking ships and it was definately not the place it used to be.
In the dim and distant past when I were a nipper, Newcastle was one of the few places outside NATS which was a career option to aspire to but I get the impression that hasn't been the case for many years now.
That said, the salary offered is indeed above the norm for ADI only, the area, depending on where you choose, is affordable and if you play your cards right a sensible applicant could reasonably expect an APP and/or an APS course within a couple of years.
If were ADI only, I'd leap at the opportunity, take everything I could, get the experience and then consider moving on after a few years.