A tourist stayed in one of London's smallest hotels - and says it cost less than the price of a train home.br br Callum Ryan, 24, stayed in the Piccadilly Hostel in Piccadilly Circus and paid just £24 for a night.br br Guests stay in a "phone box" sized pod - fit with just a bed, mirror and charging ports. br br The hotel has separate shower and toilet facilities outside of the pods for guests to use.