RAF reveals why so many planes have been seen during coronavirus lockdown

And out in the countryside, several people have reported hearing jets regualarly screaming through the skies late at night. 

Now the RAF has spoken out to reassure the public that there is nothing sinister taking place and reveal the real reason why its aircraft have been seen across Scotland.

The most noticeable planes to have been spotted recently launched from RAF Brize Norton in Oxfordshire.

These large aircraft have been observed circling Glasgow as well as making brief landings during "touch and go" manoeuvres designed to practice these tricky and sometimes risky touchdowns. 

In wartime, some planes have to make landings on rough terrain, so it's imperative that pilots are as well-practised as possible. 

This is an Airbus A400M Atlas, the type of airfact seen over Glasgow in recent weeks (Image: RAF)

A spokesman for RAF Lossiemouth told The Herald: "Due to the lockdown, the public have become more aware and interested in these activities.

"To be clear, these were all occurring prior to the pandemic. But a lack of civil aviation now makes them stand out more.

"Many of the larger aircraft based out of RAF Brize Norton, such as the C-130 Hercules, A400M Atlas, A330-200MRTT Voyager, and C-17 Globemaster regularly fly on essential, but routine training missions around the United Kingdom.

"The C-130 and A400 in particular fly quite low-level profiles, and on operations they will be used to land in areas where there are not established runway surfaces.

"This can include landing on beaches, for example."

The quiet skies have made it easier to spot military planes, which can sometimes be identified and followed using apps like FlightRadar24.

Occasionally, the military planes have been observed performing strange-looking manoeuvres such as flying around in circles (which you can see in the image below showing a late-night flight on May 11). 

The RAF said these odd flight patterns have a clear explanation: the aircraft were involved in mid-air refuelling. 

For the last three weeks RAF Lossiemouth has been involved in night flying exercise which concluded on Friday, May 15 involving Typhoon jets. 

"During our night flying window, we launched our first set of sorties around 1430," the spokesman added. 

"This meant we were able to generate two or three training serials a day – two in daylight, and one in low-light conditions.

"The Typhoon is a multi-role aircraft, which means it’s able to conduct a number of different missions while in the air; air-to-air and air-to-ground manoeuvres to name two.

"To enable our Typhoons to stay on task for longer and travel larger distances, we are often supported by Voyagers – the RAF’s air-to-air refuelling aircraft based at RAF Brize Norton.

"These Voyager aircraft will fly ‘racetracks in the sky’, and are usually visible on flight tracking websites which pick up ADS-B."

In the United Kingdom, live-armed Typhoons are on "constant standby to react against unidentified aircraft approaching UK airspace as well as aircraft that are operating in an unusual manner, which may pose a threat".

Typhoons are often scrambled on "Quick Reaction Alert" missions to intercept planes which enter British airspace

"Our last intercept was against two Bear-F – Russian Maritime Patrol Aircraft on April 19," the spokesman said. 

"Additionally the Typhoon Force are involved in NATO Air Policing missions, such as Op AZOTIZE in Lithuania where 6 Squadron deployed a few weeks ago.

"Typhoons have also been involved in strikes against Daesh."

A Typhoon jet

If you're worried by the sudden appearance of a military aeroplane, you can generally find out what it's up to by visiting offical Twitter accounts or the RAF website.

"The RAF has always been open about its operations and exercises," the spokesman continued. 

"With the public now spending more time at home, many have taken to their gardens or spent more time on their phones.

"They have also become more acutely aware of the noises above their houses, and we’ve seen a significant increase in interest in routine, but essential flying as a result.

"When we do launch Quick Reaction Alert, wherever possible we publish information as to who we intercepted, what the aircraft were doing, why the interception was carried out, roughly where it all happened, and we aim to answer as many questions we can whilst maintaining operational security.

"It’s vital that the public understand why this activity is essential to the defence of the United Kingdom."