Ryanair is planning to raise the bonus it pays staff for catching oversized carry-on baggage from the start of November.

Michael O’Leary, the budget airline’s chief executive, suggested it would raise the bonus from €1.50 per oversized bag to €2.50 and remove a €80 per month cap on awards of the bonus.

“I want our ground-handling people to be catching people who are scamming the system,” O’Leary said at a press conference in London. “I am still mystified by the number of people with rucksacks who think they are going to get through the gate and we won’t notice. We will — and you will be paying for the rucksack.”

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Ryanair charges customers up to €75 per bag in penalties for seeking to board planes with oversized baggage. The airline allows customers to take a small bag (40cm x 20cm x 25cm) that fits under the seat in front of them for free. It charges an additional fee for a larger carry-on cabin bag of up to 10kg (55cm x 40cm x 20cm), prices starting at €6.