Broadcaster and writer Muriel Gray has come to the defence of an elderly woman who she claims was treated badly by staff at Heathrow airport. 

The chairwoman of the Glasgow School of Art tweeted to the London airport's official account: "Dear @HeathrowAirport just witnessed one of your security staff being so rude to an elderly lady it caused real distress. I have a photo.

She continued: "And @HeathrowAirport I have made a formal complaint on her behalf.

"I have left my email @Heathrow Airport and look forward to a response. We know security is a hard job but there is NO excuse for that."

The Herald:

Heathrow Airport responded immediately asking the Glasgow School of Art graduate for more details on the incident. 

And in conversation with her followers she said: "Not out to publicly shame staff members. And to the security person in question I say, change the job before the job changes you."

The incident happened amid delays at airports across the UK due to heavy fog. 

Eleven flights were cancelled at Heathrow today.

Heathrow said on Twitter: "Visibility has improved today. However, if flying we advise you consult your airline before arriving to the airport."