I’m working afternoons on our enquiries desk. ‘Old leather walking boots?’ asks a raincoated lady who reminds me of Gran. ‘Freshly buffed with beeswax dubbin?’ I’m gagging for a cup of tea. ‘Sorry, madam. The museum’s banned bee-based treatments.’ Across our cavernous hall, kids are staggering out of our ‘Monarch Immersion Experience’ clutching their heads. Our historic odours unit has recreated the execution of Charles I. It’s a blend of blue blood and horseshit that’s nasally indistinguishable from the real …