One wonders how many people living on Jersey
really want/need an 'easy' link to Thiefrow that often?
If they want to get to central London, I could understand flyBe to London (Oxford), then 10 min on a shuttle to Oxford (Parkway) and 60 min on a direct train to Marylebone on the new Chiltern Railways route.
Or to LHR, one of the existing services to Gatwick, then the coach to LHR.
But a service to the spartan
Northolt, then at least 30 min struggling to reach LHR through the tortuous road system or the busiest section of the M25? YGBSM, as they say....