'All fuel transactions will be rounded UP to the next litre'
As somebody said, put in exactly what you pay for (i.e a whole figure) If you can't see the pump, park closer or get somebody to watch the numbers!!
Or, contact your Local Trading Standards Office and tell them that the Airport are dispensing fuel and charging you more for it than advertised..
Every time I've been to Blackpool (to fuel or go to NI), I've regretted it. Security are worse than anywhere else I've been in the UK, including Norwich! And the locality is a tip as well. Not much going for it really