JagRig' is correct. Can't remember the precise details - any Shineys out there? - but anyone can claim for pre-posting visit expenses, not a new thing, dependent on individual circs etc.
I believe that the ac mentioned at the start of this thread was the BAES shuttle that happened to be free on this particular day for a 4 hour window. At the company's expense they picked up the Lossie guys and did a whistle stop tour of Mrm.
I am not their biggest advocate but .....