Is 70 minutes too short for a headline slot? Plenty would argue that when you’re paying £50-plus a ticket, then yes it is. And normally I would agree. But when Richard Ashcroft bid the crowd at Margate’s Dreamland a goodnight on Friday after a little over an hour, few were complaining. The Verve frontman had just rattled through a slew of his former band’s biggest hits, rabble roused on England’s behalf ahead of their Euro 2024 final on Sunday and proved that, nearly 30 years on from his heyday, he still has a voice which can enchant. It was short though. Mind you, the crowd – here for the lat…