Story 
“Yes It Is” is a song by the English rock band the Beatles, written by John Lennon and credited to the Lennon–McCartney partnership. Described by Lewisohn as “an exquisite and intricate three-part harmony ballad,” the song was recorded on 16 February 1965 during the Help! sessions and released as the B-side of the Ticket To Ride single in April 1965. It was not selected for the Help! film soundtrack. [Wikipedia]
Lennon wrote the song in a style he and Lewisohn both recognised as reminiscent of the earlier Lennon–McCartney ballad This Boy. The three-part harmony — sung live by John, Paul and George — took three hours to perfect, and the song features George Harrison’s volume-pedal guitar prominently throughout.
What’s distinctive
One of 101 songs led primarily by John. Recorded on 16 February 1965, the same day as the
Another Girl and
I Need You overdubs.
Take count: 14 for the rhythm track, plus one unnumbered overdub for the three-part harmony — “In previous years it would have become take 15.” George Harrison’s volume-pedal guitar is “predominant again,” making this the second Beatles recording (after
I Need You the previous evening) to feature the foot-controlled pedal.
1,2
an exquisite and intricate three-part harmony ballad written by John and sung by John, Paul and George in a style reminiscent of ‘This Boy’. ‘Yes It Is’ was not selected for the film soundtrack… Instead it appeared merely as the B-side of the Beatles’ next single, ‘Ticket To Ride’, such was the group’s embarrassment of songwriting riches.
— Mark Lewisohn1