Hidden fees enforced by airlines can quickly turn an inexpensive getaway into an unexpectedly pricey trip, especially for those caught off guard by strict hand luggage rules. Many travellers assume their cabin bag will be fine – only to be hit with a hefty charge at the boarding gate for exceeding the airline’s size limits. Some carriers charge up to £75 for hand luggage that is just slightly oversized, forcing passengers to either pay up or risk being unable to board their flight.

With…