Hi Bazzer, the 3 belts on the L-Series engine are:
Auxiliary Drivebelt,
Fuel Injection Pump Drivebelt &
Timing Belt
LR recomend replacing Timing Belt & Fuel Injection pump belt every 48,000miles or 4 years.
You may also have an air conditioning unit drivebelt...
£871 seems expensive, I'd be...