VS6 Miami - LHR Thursday 27th November - Flight Cancelled - thoughts please

Fifefamily

Flight was due to leave at 17:10. Thunder and lightening and rain in Miami area from 2pm for an hour is so. Incoming flight VS5 was scheduled to land at 14:50 however it was diverted to Orlando to land due to the weather. Crew then ran out of hours so unable to bring plane back to Miami, therefore Virgin cancelled the flight and on the letter they issued they have said no compensation is due as the disruption was beyond their control and due to the weather. The weather was perfectly fine at the scheduled departure time but obviously no plane to depart on.
This was the only plane that diverted to land elsewhere during this storm with many planes landing at the expected arrival time. I will acknowledge that some planes were later in landing due to the weather.
Ultimately are Virgin correct with their opinion that no compensation is payable? It is many years since I frequented this board so my recollection may not be what it was but I thought that flights delayed/cancelled as a consequence of a knock on effect, weather in this instance, would still be eligible for compensation whereas those on the original (VS5) would not be?

dumpster_fire2025

https://www.transportation.gov/airconsumer/airline-customer-service-dashboard

Although Virgin are not on there I'd suggest that they'd consider this an "uncontrollable" delay and you are entitled to nothing.