It will be expensive, with a 1300 mile range and four hours on station.
Will that be enough for the UK's many miles of coastline ?
Off hand I believe that is better than the Nimrod which, IIRC, was 1000 miles and 4 hours.
At 440 kts (assumed) it could be on station in 3 hours vice Nimrod in 2.5, spend 4 hours on station, and return with a mission time of 10 hours some hour longer and 300 miles further out.
Fag packet stuff taking your 'poor' 1300/4 figures.