Beatles guitar

Beatles guitar valued at £400,000 on Antiques Roadshow

The prototype fretless guitar, made in the 1960s, appeared in Sunday's show.

Its current owner recorded sessions for a film company co-founded by Harrison, who asked him to play the guitar.

"I played a few notes and he said: 'Yeah, you're definitely getting more out of it than I am. It's doing better for you, why don't you have it'."

Bartell's of California made the instrument, which the owner, Ray, described as "a strange old thing to play".

A photograph in the episode shows the guitar among Harrison's collection.