This video shows (more or less) how to replace the fuel pump on a Jaguar XK8. My car is a 2003, which has a slightly different fuel system than the 2002 and earlier cars. Starting in 2003 the cars utilized a "returnless" fuel system, which means that there is no return fuel line from the engine. Prior to 2003 there was a regulator up in the engine bay, and that regulator controlled the fuel pressure by directing excess fuel back to the tank in a return fuel line. The procedure for a pre-2003 car is essentially the same, the only difference being that there would be TWO of the incredibly difficult fuel lines to disconnect.
Jaguar, XK8, Fuel Pump, Jaguar XK (X100), fuel tank, how to, sam, 1174