They might be able to make Jerez work better than ZB given that they'll have fewer seats to sell and so not have to offer so many seats at the cheaper end of the scale.
The SQ increase -based purely on 5 weekly in summer, now back to daily. The loads may be there, but we saw what SQ want prior to looking at 10 weekly - consistently high demand. Many months at 90+% loads, then we're talking business!