Hi Nick and He who shall not be named (just ordered your book from Hannants)
To help sort the Lightning wheel types, I looked through a couple of my refs,
AIRDOC "British Lightnings",
Page 16 top shows the prototype and very early F1 style with 16 oval holes,
Page 12 bottom left and page 13 bottom show XM215 F1A with recessed faces this style seems to be common on F1A's and early F3's,
Page 20 bottom left shows F2A style dished face wheels, in this case on an F6 !
I have only seen these dished wheels on F2A's and on a very few F6's.
Modellers Datafile (SAM) "The English Electric Lightning".
Page 27 top F1 with recessed wheels,
Page 32 F1A with recessed wheels,
The drawing on page 66 labeled "main undercarriage assembly" shows prototype and early F1 16 hole wheel.
Martin Bowman "Lightning Strikes"
Page19,31 and 43 all show the recessed style wheel.
To sum up, the 16 hole wheel can be seen on prototypes and F1's
The recessed wheel can be seen on a few F1's more commonly on F1A's and F3's.
The dished type wheel seems to first show up on F2A's and a small number of F6's
The flat fronted wheel is the common F6 wheel but also is seen often on F3's
It looks to me as if the wheel types were time dependent rather than which Mark, any airframe still in use in the later days would have the flat fronted wheel, but if you know different please let us know.
The wheels in the Trumpeter F1A/F3 1/32 kit are poor representations of the flat fronted wheel and could be used for the F3 but not on the F1A.
One way to spot the recessed wheel in a side view photo is to look for a ring around the ten bolts that hold the wheel on. On the recessed wheel these bolts sit on a raised ring. On the flat fronted wheel each bolt sits in its own recess, so does not show the ring.
I hope this is of use,
Cheers,
Brian.