Hi kezbed
I think the third year of the warranty is covered by the dealer so you may be safer sticking with them for the service.The second long life service would normally be done at 40,000miles or 4 years. In addition to the oil change, pollen filter and routine checks it should include the air filter, fuel filter (diesel only) spark plugs (obviously petrol only) and hydraulic fluid level check.
Cheers Spike