The ad, which was created by Fallon, broke over the weekend as part of a £17m marketing push behind the Cadbury Dairy Milk brand. It features airport vehicles racing each other, with luggage bouncing on the runway. The execution is a follow-up to last year's 'Gorilla' ad.
Bloggers have drawn parallels to the turmoil at T5, where 15,000 bags have been lost and passengers have been stranded. Others have posted videos on YouTube linking the ad and the terminal.
James Fremantle, industry affairs manager for consumer group the Airport Transport Users Council, branded Cadbury's campaign 'insensitive bearing in mind what's happening at the moment'.
However, a spokesman for Cadbury said there were no plans to pull the ad, describing it as a bit of fun. 'We're sure the public will see it that way too,' he added.