Concorde - not a heavy weight category jet but with a powerful wake and hugely different performance. Sensible inclusion for information of ATC service, just as 'heavy' is used in the US but not in the UK.
Shuttle refers only to shuttle routes, where the service operated a bit like a bus service - any further bookings beyond capacity meant other aircraft were substituted or more aircraft operating, meaning that you could always guarantee that you could turn up and fly the route as a passenger. Newcastle was never part of the 'Super Shuttle' network, as it was known by the privatised BA.
"The:"
"used as a function word to indicate that a following noun or noun equivalent is a unique or a particular member of its class"
"used as a function word before a proper name"
"used as a function word to designate one of a class as the best, most typical, best known, or most worth singling out"
Who cares which it is? There is only one of that flight number airborne at any time. Anywhichway it is 'the'.