Have you noticed ? - LIVE AT THE BBC is not all "LIVE."

When I was listening I could tell that there's some obvious double tracking going on. (chorus of She's A Woman and many other tracks).

When "A Hard Day's Night" played I said to my wife, "I wonder what they'll do for George's solo?" And the weirdest thing happened: during the solo, audio from the album version was inserted into the live performance. I'm sure of it. The tempo changes, George Martin's piano is audible, then when it goes live again Paul's bass suddenly returns. Surely George eventually mastered that guitar solo.

What are your thoughts about this, that, and the other thing?