I also heard the same cut the other Friday night whilst listening to Century ill in bed. Must have heard it about 20 times though – shame they don't seem to have any different cuts for High School Hits!
It sounded to me like a version of one of the cuts from the Oak 107 jingles produced by Bespoke Music Company around '03. You're right in that Radio Hartlepool did also have a nice version of this cut too, which I think was done through Devaweb. Chris?
Century FM's GMG sister brand, Real Radio, also had an interesting version of this cut for a competition 2 or 3 years ago…. “Life's a beach, and then you win one…. Real Raadio” That's certainly best version I've heard!