The base plans are interesting as I understood from some TUI crew that BHX was getting a Max in 2019 from June to be used on the longer sectors like LCA,PFO and HRG ? That is the reason some people have had their flight times changed recently on these routes so that the Max aircraft can do two longer routes a day so most cost effective.
This does make sense of it doing the longer sectors rather than doing LGW-PMI on a regular basis, We shall have to see how the fleet plans progress