I was offered pack at £399 in December 2017 and that's the price today. They keep chopping and changing what's included. On this deal the brake fluid is def not included although the SA said it was until I suggested she checked.
https://www.bmw-service.co.uk/service_packs
So as to service intervals, your I drive will tell you when it's to be expected. For me it's 2 years from new (£376), then the brake fluid (not included) and then after 4 from new a big service (£500+). They're also the mot at an unbelievable £80+.
So on raw figures alone its either £399 or £376. Of course the service pack is a good fixed price against inflation of the service prices. On the other hand our dealership does special 4 year plus pricing