That is some of the current batch of new f/deck are sat on their backsides awaiting their i.d cards to be processed by HR before line training ???
I doubt this would be the case - to fly out of Leeds, all you need is your passport and licence while your ID is being processed, I know this from personal experience.
Regarding new more southerly bases, I know of a few people who would jump at the chance to move south, but I always thought the attraction of Jet2 was the northern bases near where people wanted to live. I'd imagine the majority are quite happy where they are.