A friend of mine pointed out this site. It’s free and you can just follow a guide on a tour in places all over the world (UK included) The tours last for 45 mins to an hour and you can leave a tip for the guide if you want to. It’s great if you have an hour with nothing to do. I was walking around Monmatre last night and I’ve ‘been’ to Portugal, Canada, London, Oxford, Venice and a great one in Dublin based on the Easter Rising. 

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