Conversation so far:
Where were the abbey road rehearsals?
The Beatles first taped 25 takes of the song at EMI's Abbey Road Studios in London.
Are there any other interesting aspects about this article?
Harrison was increasingly allowed little room to develop ideas on McCartney compositions, whereas he was free to create empathetic guitar parts for Lennon's songs of the period.
Who did they rehearse with?
30 July rehearsals were filmed for a short documentary titled Music! However, the film shows only three of the Beatles performing "Hey Jude".

Question: Why onyl 3 beeatles?
Self-contained rewrite: Why were only 3 of The Beatles seen rehearsing Hey Jude in the documentary Music?