The adaptors pictured are from left to right;
B type adaptors used to tow Bedford 4 & 8t TM. Apart from being used with the Hollebones to tow they can also used in conjunction with the Bedford adaptor which when fitted to the swivel bar on the boom (under lift) hangs down from the swivel bar and connects to the recovery eye to carry out a suspend tow (Scammell and Foden only).
FV430 Series adaptors (as already stated).
C type adaptors used to tow Bedford 14t, CVRT etc.
As stated they come as a set of 4 typically called A,B,C,D types adaptors. All are on the CES of Scammell Eka, Foden 6x6 Recovery and MAN SVR.