If you want a lesson in wowing children, follow the lead of Dukes London, which bowls over my two boys within seconds of walking into their room. Duvet covers feature their favourite Marvel superheroes. The beds are topped with a soft toy Dukesy (the hotel’s cute canine mascot) and a personalised dressing gown. There’s even a teepee in the corner, filled with games and draped in fairy lights. It’s a child’s dream room.