By Seamus Duff Tensions could erupt on the set of Holly Willoughby and Bear Grylls’ new Netflix show as two contestants have some past beef – by association. Earlier this year it was announced that 43-year-old Holly and 49-year-old Bear have teamed up to make a I’m A Celebrity… Get Me Out Of Here! style reality show called Bear Hunt. The show is due to air in 2025 – but reports have already revealed a number of the cast taking part and it is believed filming fro the show will soon be under way. Among the rumoured cast are The Saturdays singer Una Healy, 42, and 36-year-old rugby hunk Danny Cip…