From section 1.12.2.2 of the AAIB report:
"Documentation was retrieved from the pockets of the pilot’s anti-g trousers and
flying suit including hand-written notes, a number of checklists and a copy of
one of the display maps for the 2015 Shoreham Airshow. Documentation in
the transparent knee-pockets, which would have been visible to the pilot during
the flight, included a checklist and a hand-drawn diagram. This diagram was
not specific to the display routine performed by the pilot at the 2015 Shoreham
Airshow; video evidence indicated this same diagram had been visible in the
pilot’s knee-pocket during a previous flight (see Section 1.11.7.5).
The pilot had annotated one of the display maps for the 2015 Shoreham Airshow
(see Figure 17) with the sequence of manoeuvres he intended to fly during the
display, and other reference information such as relevant frequencies; this was
found folded in a separate pocket, and would not have been visible to the pilot during the flight."
This makes for difficult reading. Having read it a few times I have come to the conclusion that the so called documents whilst on a previous flight being placed in the transparent knee pockets of his flight overalls, were not on the occasion of the accident flight in the same position so as to be visible during flight. Moreover his notes were not specific to the routine actually flown during the display.
Why were these not placed as before in a position of sight, why did they differ from that which he actually carried out.