Its defo for the resale value... Apparently due to white being not that popular they had to pay extra for the cars to be painted white.. Well thats what transport OCU told me... What dont make sense is that BMW offered the met an entire BM fleet which would be cheaper than the current Vauxhall fleet, but the Met turned it down saying that the public would perceive it as that they are spending all the tax payers hard earned on motors and not police.