Hmmm......I remember reading an article some time ago, just after they got XR773 back in the air, that they only had spares support to fly 3 of the 4 at any one time....lifed jet pipes being a particular problem IIRC
Will certainley be a sight not seen since April 1988.....as I don't think the post RAF use 4 x F.6's that were used at Warton ever got in the air at the same time before one of them was permantly grounded.
And I do believe Mike Beachyhead does fly his Hunter's, Bucc's and Frightning's on a PPL.