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 23 Sept 8pm 30 mins Share this episode: Copied to clipboard Share on Facebook Share on Twitter Copy link to share