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Going through security is non-negotiable when travelling through an airport. But people always have the right to refuse to be searched in a certain way.

Typically, after checking in for your flight, passengers make their way through the airport and are stopped at security gates before being allowed into the main terminal and onto any flight. The process can take a while, especially during the peak summer holiday months, but usually involves hand luggage being sent through a scanner and going through one yourself.

But, under UK Department for Transport (DfT) regulations, you generally have a right to opt out of a body scan. You do not actually need a valid legal or medical reason to refuse this and can simply state that you do not want to go through the scanner for personal reasons.

Some people refuse to be scanned if they have medical devices, such as a pacemaker or an implantable cardioverter defibrillator (ICD). You can also ask for a hand search of hearing aids.

It is stated on the GOV.UK website: "You should bring a letter from your doctor stating why they should not be scanned. However, it is up to the airport to decide if they need to be scanned or not."

Pregnant women who may feel uncomfortable being scanned are assured by the UK government that scanners (which use non-ionising millimetre-wave technology, not X-rays) are safe.

However, this is not a way to avoid security checks altogether, as passengers will still need to undergo an alternative screening method. If you opt out for non-medical reasons, the law requires you to undergo an enhanced hand search in private.

This involves being taken to a room away from the main security line for a process that some claim is more invasive than a standard pat-down. There will be at least two security officers, and it may involve loosening or removing some clothing to ensure nothing is concealed.

The process can also significantly increase your time at security, anywhere from 20 to 45 minutes, depending on staff availability. Account for any flight delays and ensure there is enough time to board the plane before departure.

The Gov.uk website explains that adults and children can be asked to have a body scan. It said: "You'll have the scan in the security area, with a member of airport staff present. It will take just a few seconds.

"Your image will show if you have a colostomy, implant or prosthesis. Security staff have been trained to handle sensitive issues around surgery and treat passengers respectfully.

"After the scan, only you and a security officer will see a mannequin-style diagram on a small screen. No bodily features or skin will be seen. Your scan will be permanently deleted after it's been assessed by a security officer."