Greek (island) tragedy?

When Poppy and Graham are whisked off to a Greek island to watch musician Bill Strummer marry his much younger girlfriend in the celebrity wedding of the year, they are expecting sun, sea and a hint of scandal. But things begin to turn sour when Bill's distressed ex-wife turns up, proclaiming that he's still in love with her. Then wedding guests start to die of "natural causes", and Poppy and Graham are forced to investigate. It would seem that one member of the wedding party will stop at nothing to disrupt the celebrations...