The sessions section of Ant's discography only includes
those tracks where he is officially credited as having played on and/or
produced one or more of the tracks and where they were actually issued on a
commercially released LP, CD or download.
I'm afraid that the Swinging Blue Jeans session does not count in this
respect for a number of reasons.
Whilst there is no doubt that Ant and Rivers attended the
Swinging Blue Jeans session at Abbey Road - Ant still has the photo that the
band members signed for him that day - and got to do the handclaps on a
recording of the song, there is no definite proof that the take(s) of the song on
which they clapped was actually released on record.
As Ant mentions in the video, the Swinging Blue Jeans were
performing later the same day at the NME Poll Winners Concert, which took
place at the Empire Pool Wembley. That
would date the session at Abbey Road to a Sunday in April 1964 - but Hippy
Hippy Shake was released as a single (and became a chart hit) in the UK in December
1963 and there are no handclaps to be heard on it.
Given this, it seems likely that the version of Hippy Hippy
Shake recorded at the session that Ant and Rivers attended was a re-recording, which
if it did see the light of day came out on a 1964 release. There was a 7" EP ('Shake with the
Swinging Blue Jeans') which includes the song and seems to match in terms of
the date it was released and there appears to be a different recording of the
song (with a count-in at the start) which if you listen closely does appear to
have some handclaps on it at one point - but all of this is too tenuous in my
view to include it as an actual session appearance. It's a great story though!