There are a couple of recent less-than-complimentary reviews of Shuttleworth on Tripadvisor.
One reviewer reports that he was told the new £15 charge was a "Covid measure" (!) and, like many other would-be visitors on the day, he voted with his feet.
Another remarked that notwithstanding the new pricing regime, basics like keeping the toilets clean and unblocked appeared to be beyond the ability of the management.
Tellingly, neither review attracted a response from Shuttleworth, which says it all.