Roughly, Towers food went to "abysmal" generally, with minor pockets of "reasonable", but overpriced decency (currently Woodcutters and E Express), about two decades ago.
The queues for food on busier days also put us off.
We used to eat quite well at Towers using their food, we were forced into self supply when the food became third rate, at premium prices.
So two decades of express parking, no queues, quality picnics in good company, and real beer, in real glasses, for just over a quid a pint...
Compared to refusal of service for a bottle of brown ale for nearly a fiver because I had the indecency to try to use cash.
Express makes for quicker entry and exit to the park as well, an extra hour on the rides, and a handy dumping point for coats/bags etc.