Here are a few behind-the-scenes snaps and a grab from the Abbey Road webcam...
Here's David shooting his cameo as the mad director… Jon Klein lines up a shot with pointers from Beatle expert Richard Porter…
Richard's suit is a replica of the one worn by The Fabs on the Royal Command Performance…
From Marylebone, it's off to Abbey Road, here's filmmaker Jon in the private London Walks ultra- luxurious limo, cunningly designed to resemble the 139 bus to Golders Green…
In his own write (I'm loving Andy's "naughty" face)…
We're ready for our close-up…
The van that blocked our shot for AGES (from the Abbey Road webcam)…
And finally… we cross the road…
A splendid time this afternoon larking about with @londonbeatles & @hallett_g shooting the #Beatles @londonwalks promo film! pic.twitter.com/3lBBDIHX5r — Adam Scott (@AdamScottG) July 17, 2017
The London Walks Beatles film is coming soon! For full details of the Beatles London Walks click here: http://www.walks.com/popular-walks/beatles
In the meantime, here's one that Jon Klein made earlier, the Rock'n'Roll London Pub walk video…
A London Walk costs £10 – £8 concession. To join a London Walk, simply meet your guide at the designated tube station at the appointed time. Details of all London Walks can be found at www.walks.com.