How to visit a European City in a day from London

Embark on a journey with me as I divulge in how to do the perfect day trip to your favourite Europe cities from London on a b

I came up with the idea in 2016 and the first city I did was Copenhagen on the 4th February 2017. I then did Rome, Valencia for a date and we ended up been together for 2.5 years, Berlin & Paris