Not really, can't think of what else needs saying tbh and I'm not going to just change my mind because other people don't agree. But whether LS use NBE or not is irrelevant to what EZY do.
Also might be interested to see that EZY is designated carrier on the route, so could be part of the agreement that they use MIR.
“EasyJet is a designated airline on the UK-Tunisia Air Service Agreement and is therefore able to operate flights to Monastir."
EasyJet to launch Tunisia flight | News | Travel Trade Gazette
Now can I very politely ask that we now put this topic to bed?