Unfortunately a number of airport operators have seized a heaven-sent opportunity today to increase their revenue after this incident and direct all incoming vehicles into their short-term car parks to drop off, where the users have to pay. Airports have long had the drop-off traffic in their sights as yet another revenue stream to plunder, and this has given them the chance to slip it in while pretending it is all in aid of security. This is a completely unacceptable approach, to profiteer on the back of the events in Glasgow.
It is the DFT that has not allowed any privatly owned traffic to drive in front of the terminals of the UK airports. And just like to point out that not all airports have an instant parking charge policy at their short stay car parks. e.g. CWL that has the first 30 mins free ( more than enough to drop passengers or pick them up).
Many car parks at airports are operested by Private company's such as NCP. Wouldn't the airport advise them of what charges to apply as long as long as the parking companies get their fare share of the profit.