They should all be 6yrs *really* as there's no difference in any parts fitted but I still recommend them at 5yrs purely because of the water pump being the weak link if it's leaking.
As much as I'd love to do it for you, by the time you'd driven from Leeds and back the fuel would probably put you in RSTunings price bracket.
We're in Nottingham though and prices on the website if you want to make the journey.