They can walk around, surely, to identify which vehicles are undamaged
From the article linked at #3630
A London Luton Airport spokesperson said: "We understand the distress this incident has caused for our car parking customers, and that many are still anxious for more detail.
"We are sorry that we have not been able to respond as quickly as we would have liked. We have contacted all customers who have booked with us directly and are working hard to provide more details as soon as possible. However, this a complex, and ever-changing situation and as the car park cannot be accessed safely, we are unable to confirm the condition of any individual vehicle at this time. We are working with APCOA Parking and the Motor Insurers' Bureau (MIB) who will co-ordinate with the various vehicle insurance companies."