Wierd...

There's someone parcel-bombing companies/organisations relating to driving; an office in London that deals with the congestion charges, a company somewhere in England that produces speed cameras, and now the DVLA headquarters in Swansea - where they process licences, motoring fines etc.

Someone's obviously gotten caught speeding a few too many times and decided to take revenge. Let's hope he's not holding a similar grudge regarding his car insurance....