This is one of two clips that retain the modern UD22715FC series of fuel pumps. 1966-1977 Corniche, Shadow, T Saloon & Coachbuilt (VIN 1001-26700) 1973-1979 Camargue (VIN 14674-33187)

Fuel pump adapter 1985-1986 Turbo Only (VIN 12361-15787)  

This is the main fuel feed pipe. It runs from the main fuel pump and connects to the pipe that fits into the rear of the fuel filter. 1986 (Vin 20001 onward)  Azure, Brooklands, Continental,...

This is the Union for the Suction Pipe Fuel Tank & pipes 1956-1965 Silver Cloud & S-series & Continental 1959-1968 Phantom V

This is the o ring that sits on each end of the fuel feed pipe (UV20428PA & UV20429PA). There are 4 required per engine and they are sold each. 1998 Onward