Disaster! The Tesla Adviser in Bristol got in touch this afternoon to say that although she has found the order on their system (yay!), there's no Tesla referral code, and thus free supercharger miles, attached (boo). I have two reassurances in writing that the fleet company had the code, but it looks as if they may not have actually passed it on to the lease company that placed the order.
Though I'm still investigating, if there has been some sort of cock-up... Is there any way of getting those free miles...?