Both vehicles and batteries were modified to facilitate a fast battery exchange.
Another reason is to determine if a vehicle has been illegally modified.
Some vehicles were modified for specific use with an armoured regiment.
Since then, several vehicles have been modified; these are 1001-1017 and 1021-1026.
These vehicles are often restored to their original condition and sometimes modified.
In the film the vehicle is heavily modified for spy demands.
In such case, the vehicles are modified standard transit bus, but with only one door and air conditioning.
The problem occurred because of the way the vehicles were modified for right-hand-drive.
About half a dozen vehicles had been so modified on 10 May.
No vehicle had yet been so modified in May 1940.
