Originally Posted by
Jwscud
In the UK, the holding fuel recommendation is published in ENR 1.9.9 regarding flow management for airports within the London TMA.
Live information on expected delays is passed generally on first contact with London Control.
ATC Used to issue an 'Expected Approach Time' (EAT) in case of comms failure if the delay in the hold was more than about 20 min; don't know if it's still done.