Oil and Filter - every 6 months or 6,000 miles
Just that - recommended for high mileage drivers, every 6 months or 6,000 miles 

Interim Service - every 12 months or 12,000 miles 
Oil and filter change 
Battery test
Brake and brake fluid check 
Coolant check
Washer fluid top up
Exhaust system check 
Wheels and tyres check 
Suspension check 

Full Service - every 24 months or 24,000 miles 
Everything as with Interim Service
Air Filter change 
Spark plugs (if applicable)
Fuel filter (if applicable)
Full diagnostic check