The safest and most reliable way to get home after a night out, when you can find one. The drivers spend up to 4 years training to learn 'the knowledge', literally every sidestreet and backstreet in London. The minimum charge is £2.20. They are the only licensed cabs able to be hailed on the street. Avoid unlicensed cabs like the plague. Heathrow to Central average cost £40-70.