Heather has leg swabbed at airport.
The 42-year-old was at the airport to catch a flight to the US to launch her meat-free ready meals when the alarm went off.
She had to roll up her trouser leg in public while her prosthetic leg was swabbed in front of other passengers.
A spokesman for the Dancing On Ice star denied she was angry about the incident and said: "Heather complied with security's requirements with good grace.
"Heather wasn't furious at all, she completely understands what has to be done for 21st century travel."
A spokeswoman for airport owner BAA said: "She was swabbed because something set off the alarm in the metal detector.
"Staff could not see inside the leg so it was swabbed instead. This would be the same protocol if a passenger had a cast on a broken arm or leg."
STOPPED: Heather Mills arriving at Terminal 3 of Heathrow Airport