Holidays are the most common reason. Unlike us, presenters actually get to enjoy a proper Easter Monday or a sunny August break. When you hear a stand-in, it’s almost certainly because Vernon is off with his family—likely Tesla-driving Tess Daly somewhere—recharging his batteries.
Bank Holidays are a particular radio animal. Radio 2 often flips its schedule for national holidays, bringing in specialist shows or pre-recorded specials. Don't expect your usual routine; the BBC loves a bit of schedule-tinkering to mark the occasion.
And then there’s the ‘Lie-In’. Yes, even presenters who wake you up need a slow Sunday. Vernon, like many of us, occasionally takes a day off to sleep past 5 a.m., leaving a trusted colleague to hold the fort.