I would say guaranteed to get caught, based on experiences recently. U2 have a very strict cabin baggage policy of 1 item per passenger unless EJ+ or Flex Fare. If I was you, I'd re-think about whether I really need all those bags, or alternatively check a bag in the hold. Depending on where you are leaving from, there is the option of Hands-Free as well which allows you to check a bag into the hold for only GBP5 each way