There is already a facility for disabled supporters to use the Sussex University car park and travel by accessible minibus between their parking place and the coach park (using a drop-off point next to the lift that goes down to the concourse). There's no need for the "pick up" vehicle to be...
To be honest, I don't think East Sussex County Council are very bothered about traffic conditions that occur for about 30 minutes every couple of weeks on a minor rural road at the very edge of the county.