Final Reserve isn't for holding!
It is mildly disturbing, but perhaps not surprising, to see the usual confusion between fuel for holding and the final reserve. All JAR-OPS operators are required to define in their Ops manual an amount of fuel which they will always (except in an all-out emergency) have on board when they land - including when they land at their alternate. Because you need to come up with some simple mathematical numbers and you can't allow for all possible conditions, a convenient answer has tended to be "that amount of fuel that I would burn if I flew for 30 minutes at normal holding power". If you fly only a single type that can then be translated easily - you just have a number (apparently 7000 kg in Intruder's 747) - although many pilots seem to "remember" the bit about 30 minutes of holding. BUT - just because somebody in the office came up with a number that used concepts like "30 minutes" and "holding" does NOT mean that you can use your final reserve to hold for 30 minutes! In fact the only fuel you can use for holding is the "extra" fuel you have on board. Extra fuel is the fuel over and above the fuel to destination, diversion fuel and final reserve.