Do you use PBC ?
Do you have planned mandatory fuel unused at the destination ?
How much fuel did you actually land with ?
Pardon? PBC?
Our flight plans are for max payload, but the actual payload is often less than that so we always have some extra fuel when we arrive at destination, and we did indeed land with fuel well in excess of minimum diversion fuel. 4 tonnes if I remember well.
But I don't understand how a 6 minute contingency comes from, it is s the first time I've seen it.