A huge RAF plane which was spotted circling low over Glasgow was completing a training exercise making approaches to the local airport.

At around 10:35pm on Tuesday night bemused locals heard the sound of the aircraft and watched as it flew low over the city on an eliptical path.

Online flight tracking service Flightradar24 showed an Airbus A400M Atlas transport aircraft enter the city's airspace, reaching a low altitude of around 600 feet at the airport and before taking to the skies again.

After only 35 minutes the Airbus began to fly back towards its base at RAF Brize Norton in Oxfordshire at around 11:10 pm.

The loud noise caused by the aircraft quickly became a hot topic for discussion on social media as people began to question its route.

 

One Twitter user said: "Anyone got an idea why this RAF flight from Brize Norton is circling Glasgow Airport, dropping down to a few hundred feet but not landing?"

A third said: "Going by the noise it was one hell of a big aircraft."

The Atlas A400M is a transport aircraft which has been in service around the globe for around nine years. Capable of carrying a maximum payload of 37 metric tons, it can be used to deploy troops as well as humanitarian aid and has the capacity to airdrop supplies. 

A spokesman for the RAF said: “A Royal Air Force Atlas A400M aircraft from RAF Brize Norton in Oxfordshire was completing routine and pre-authorised night-flying training around Glasgow yesterday evening.

"The RAF use a variety of locations around the UK for training as they provide complex airspace and differing challenges for our pilots to ensure we remain ready and able to deploy on global operations.”