1 April 1968 FEAF Singapore RAF 50th Flypast

In the last few days I have seen photographs of the flypast that flew over Tengah, Changi and Seletar on 1 April 1968, to mark the RAF’s 50th Anniversary.
There are two fourships of Canberras,
two fourships of Hunters,
one fourship of Javelins, Meteors, Lightnings, RAAF Mirage IIIs,
with a solo Canberra slightly above the rest. So 39 aircraft in total.

Canberra x 4

Canberra x 4

Hunter x 4 Hunter x 4

Javelin x 4

Meteor x 4

Lightning x 4 Mirage III x 4

Canberra x 1

Does anyone know the units of the machines and the serials? I’m intrigued why there were eight Hunters (all from 20 Sqn. ?) whilst all other units seem to contribute four aircraft each. Also the order of units seems odd, as it is not in type order nor numberplate sequence.

I saw this flypast but it seemed something I would never find any info about. Any snippets very gratefully received.

Ian