Monarch
Thanks for the info OltonPete. It does sound like Monarch are going into battle with easyJet on the Naples & Rome routes. I wouldn't be surprised to see easyJet go daily to Rome next summer. They compete successfully on several other routes so no reason these two routes can't do equally well from Luton with two carriers.
Given that all 5 aircraft will be fully utilised next summer, it wouldn't surprise me to see them add a 6th aircraft at some point to facilitate further growth.