It was
4 Merlin HM1's
2 Seaking ASAC7
2 Seaking HUR5
4 Commando HC4
5 (or 6?) Lynx (Mk3/7/8)
4 Jetstreams
I think a couple of Merlin HC3 and Chinook HC2s (which took part in the Yeovilton flypast a couple of weeks ago) but unsure if they took part today.
In all though i think around 30-40 aircraft took part in the rehearsal at Yeovilton a few weeks ago which included all the single engine types and historic flight plus the Sea Vixen and others.
I can't confirm what took part proper today because the TV News teams decided not to show anything apart from a few Merlins and Seakings.