It seems to be consistently one of the cheaper petrol stations in St Albans and near to M25/M1 so wouldn't be surprised...
(Not affiliated to it, but i monitor prices using: http://tinyurl.com/ex9ty as I have a choice of about four places where to buy (Hertford, Dunstable, St Albans etc due to work.)
£130k - £220k pa + Company Benefits
£65k - £130k pa + Company Benefits
£65k - £130k pa + Company Benefits