BHX also says Birmingham Airport is only 70 mins from London. Great, that means it's only 70 mins travel to catch your flight from a London airport. Happy days!
From London-EUSTON only. Realistically, how many journeys start or end there? In reality there's going to be another 1-2 hours to add to that.
Going by road? could be a great deal more. The long and short of it is quite simple: if you're catching a flight from Elmdon and travelling from London (or the south east generally) allow a hell of a lot more than "70 minutes"!
BHX also says Birmingham Airport is only 70 mins from London. Great, that means it's only 70 mins travel to catch your flight from a London airport. Happy days!
Not necessarily "London-centric", it's a similar distance/time to Manchester. The truth is that BHX is squeezed by the proximity of both Heathrow
and Ringway, and both are larger airports.