I know it'll be a few years down the line but assuming Easyjet stay at SEN for the 10 years of the deal I wonder if they will have an all A320 fleet as they are now only taking delivery of this variant and not A319's.
I think on average they keep aircraft about 6-8 years and then replace them.
Could A320's operate the longer routes from Southend? Presumably they can do the BFS and AMS OK