I'm not sure about UK PS2s, but I can vouch that the ones in the US had a standardized system. The AV cables for the PS1 work on the PS2, the PS2 ones work on the PS3, and the PS3 cables that had an equivalent in the PS2 era work on the PS2. My parents have a PS3 component video cable hooking up their PS2, which they use as a DVD player. However, be careful getting the power supply; as PlasmaFrog mentioned, there were two different versions; the one for the original model, and the one for the slimline. The one for the original model is identical to the one for the original PS1, incidentally.