y'know, I'm not seeing a big mystery here...
Mystery cat takes regular bus to the shops | the Daily Mail
Bus drivers have nicknamed a white cat Macavity after it has started using the No 331 several mornings a week.
The feline, which has a purple collar, gets onto the busy Walsall to Wolverhampton bus at the same stop most mornings - he then jumps off at the next stop 400m down the road, near a fish and chip shop.
[more at link]