I think the cold weather put a lot of people off.
TBH it's a shame this the bi-annual event is not 'positioned' at
slightly 'warmer' times of year. The one in April is usually wet...
and the Nov one can be cold, wet, dull, and/or miserable.
But having said that, I have to admit that I have attended these
where the weather has been good and the car park has been
jam packed with Smart's. The foibles of the English climate, eh.