It appears Phil Hughes Minibus Beatles Tours is no longer in business

It's also helpful if you fill out the Guidebook Feedback form so they can update.

https://www.ricksteves.com/forms/guidebook-feedback-form

I think going forward suggested tours, restaurants, smaller businesses in any of the old guidebooks will have to be checked.

A guidebook is just full of suggestions, nowadays you have to confirm everything. Every. Thing. Opening days and times, entry requirements, fees, etc. etc. etc.

Yes, I always have rechecked all websites before a trip for any updates. Guidebooks are just as they advertise themselves to be, a guide to help plan a trip.