Urgent holiday warning to anyone with flights booked in the coming months

A travel expert has issued a warning to anyone with booked in the coming months, with some having already faced a "nasty shock" after arriving at their airport.

Alex runs the Under The Sun channel on , and also has a , where she shares , holiday news, and important tips for tourists.

In a recent YouTube video, she said she had a "warning" to anyone planning to "travel light" for a "long weekend" on the Spanish island, on flights booked with a low-cost airline. But her warning also applies to anyone with a flight booked to anywhere in the coming months.

She said: "As we move on into winter, you may think that they [low-cost airlines] may not place so much importance on luggage sizing, and indeed on what you carry onto the planes as well."

However, Alex warned this is "not the case".

She went on: "I'm reading on a lot of Facebook groups - particularly in regional airports across the UK, in fact all across Europe as well - that the airlines really are double-checking and triple-checking to make sure that the size of bags you take onto the plane do not outmeasure the baggage sizes they have in place."

Alex has been told that these airlines are "rigorously checking passengers too", as well as issuing fines. She added: "I've seen flight passengers being charged anything from €55 (£46) to €90 (£75), to then have their hand luggage checked-in onto a flight."

Wrapping up her warning, Alex said: "So if you are travelling this winter, just Google 'baggage rules easyJet', 'baggage rules Ryanair', whichever airline you're travelling with, to find out the exact dimensions of the bags that you are allowed to take onto the plane - and don't go outside of this. Because if you do, well you could be in for a nasty shock when you get to the airport."