Oops! You need to enable JavaScript in your browser to start watching. ITV Heathrow: Britain's Busiest Airport Series 6 - Episode 6 This time at Heathrow we're in the coloured lanes of customs and excise, rummaging through passengers' carry on, on the lookout for secret stashes. Wed Wednesday 21 Jul 11.45pm 25 mins 13 days left Share this episode: Copied to clipboard Share on Facebook Share on Twitter Copy link to share