There are three separate conversations going on:
1. The belief that because the coming together in a public car park, as opposed to the main highway, it is somehow not subject to the normal insurance provisions. That belief is incorrect.
2. There is then the red herring that the European court has ruled that vehicles that are always on private land (ie never touch the road) should / must be insured, just as if they were ‘normal’ vehicles. What I assume the court was thinking of are vehicles like agricultural tractors or combines, particularly those in very rural or agricultural areas, who may well never touch a public highway in their life. Logically, this would associate embrace say. motorbikes and the like that are ragged about on by kids (and adults) in fields.
3. Someone, why is not clear, then extended the European court’s ruling to embrace motorsport cars and the like, F1 being sited as an example. That leap has since been ruled out. Of course the organisers of large public events (and the teams participating) more often than not insure their liability to third parties extensively, often for many millions of pounds.
Bods can moan that the feckin’ courts are feckin’ mad. That moaning will cease when, when out walking their dog across farmer Gile’s field, their legs are chopped out and off from under them by little farmer Gile’s son (aged 9 3/4) and his brother aged 14, ragging a 50cc bike and a shonky 125. Similarly, bikermate Fat Bob from Barnsley, will be only too happy when myopic Mrs Boggins’ insurer coughs up £10,000 to repair the awsome GS she somehow contrived to knock over and then park on top of in Lidl’s ‘private’ carpark, ruining his day and his underpants.