More passengers than ever are ducking baggage fees by taking hand luggage only on flights, according to Ryanair.

The low-cost airline says that travellers are bringing more and more into the cabin, and this could lead to a change in its baggage policy.

“I’ve seen two-year-olds wheeling a bag up to the plane as people try to take advantage,” Ryanair’s chief financial officer, Neil Sorahan, told The Guardian.

As it stands, a two-year-old child has a free luggage allowance of a 10kg suitcase and second small bag – just the same as an adult.

“We’re very generous with our cabin baggage allowance,” added Sorahan. “If everyone does that there’s no issue. It’s the people coming with the kitchen sink that could change the policy.”

The company upped its baggage policy from one case only back in December 2013, as part of a PR campaign to improve Ryanair’s image.

Ryanair chief executive Michael O’Leary said at the time: “We are very excited at these significant improvements in what is already Europe’s number one customer service airline.”

However, four years on, the airline is saying it might have to make its policy less generous again. When asked if passengers were “taking the piss,” Sorahan said: “Some are... The vast majority of people play by the rules but some don’t. Unfortunately some bring massive backpacks and things that don’t fit under the seat. We’ve been a little bit lax or nice – we are victims of our own niceness.”

Those who bring bags bigger than 55cm by 40cm by 20cm and/or heavier than 10kg as hand luggage risk being charged £50 at the airport for it to be checked into the hold instead.

Ryanair also ruffled feathers recently by warning that, unless a deal is struck soon, there would be no flights from the UK after Brexit. It said it could move its planes out of the country if no aviation deal is reached by next year.

Ryanair has almost 90 aircraft based at British airports, and flies them to dozens of European destinations under the EU “Open Skies” agreement.

Announcing its first quarter results, the Irish airline warned: “There may not be sufficient time, or goodwill on both sides, to negotiate a timely replacement bilateral.