Tim Dunn on Instagram: "I asked visitors at the National Festival of Railway Modelling one simple question: what do you LOVE about model railways? Here are just a few of the brilliant, lovely, answers that I received from friends and people I met, all keen to talk about their passion: a hobby that is surging in popularity. For transparency, because @crosscountrytrains sponsored my trip, this is technically an #Ad, btw, but don’t let that put you off: my friends at CrossCountry are model railway