TUI fly will monitor more closely whether passengers actually comply with the rules concerning hand baggage. More and more passengers are travelling with hand baggage that exceeds the official standards in terms of size and weight. Due to the limited space for hand baggage on board, it is almost impossible to store all this baggage safely on many flights. As a result, more and more of the hand baggage is forced to be loaded into the cargo hold, which often leads to dissatisfaction on the part of the traveller.
From now on TUI fly will always perform checks at the check-in desk to ensure that the boarding of the aircraft goes a lot smoother.
More info via https://www.tuifly.be/nl/bagage