After a longish break, I was out yesterday with a colleague practicing our formation flying - I'm glad to say that it went well and after an hour of leading and half an hour of following I'm reasonably well back into the groove.
But, it did occur to me that it would do me no harm to do a bit of reading and refreshing on the general theory, hand-signals and so on. So, I took a look around at what was available. I found:-
Pdf manual on leaning formation, but mainly aimed at aerobatic pilots (which I'm not).
"Builders books" manual on formation, with video. (does anybody know if this is any good?)
Another large pdf, team RV formation training guide. (I found this very helpful, particular as it was free

)
Would anybody else like to share any useful formation links or thoughts?, particularly with regard to light aircraft formations?
G
(Edited 1020Z, 16 April by Genghis to correct poor link spotted by FFF)