i dont think jet2 would base an 757 at southend if thay will be flying into southend it will only be sort flights like to leeds/bradford , blackpool or paris
What do you base that judgement on exactly? Jet2 seem to have been shying away from flight only city destinations in favour of their low-cost holiday arm.. I just dont see why they would want to serve domestic destinations next to EZY, unless they are just looking at aircraft utilisation.
I think Sxflyers post is the far more credible rumour, it gives Jet2 the chance to edge into the southern market, but with no direct competition. I stand to be corrected but Easyjet would not be able to operate those destinations mentioned with A319 equipment.
Certainly an interesting rumour, and I hope it becomes reality before long.