If you’re flying into London, we have a few tips:
Gatwick | First Capital Connect train to St. Pancras station
Stansted | Stansted Express train to Tottenham Hale, then a Victoria line underground train to St. Pancras station, underground train to King’s Cross station
Heathrow | Piccadilly line underground train to King’s Cross. Or you can catch the Heathrow Express train to Paddington Station, then Circle or Hammersmith & City line underground train to King’s Cross
Luton | First Capital Connect train to St. Pancras Station.