120.4 (who started all this)...
As said, given the figures you quote (landed just above "reserve"), suggests he was well aware he "may" land below reserve. That means a PAN.
My interpretation of "reserve" (as 30mins holding) implies sufficient for a GA and tight circuit - albeit on a Mayday declared as you went around ("will now land with less than reserve"). So there should have been fuel for a GA...
So, sounds like 2 "errors" this am made the situation less than clear cut.
Unlike some, I have no beef with the low (very rarely required) figures we can work to. However, this must be associated with the required PAN / Mayday calls, and given the good nature of LHR ATC, advance warning of them happening. It is only by making these calls that:
1. ATC know exactly what the situation is, and can "sterile" / send around others etc.
2. Record how often these situations occur. If "too often", then put pressure via CAA to up the fuel minimums.
Whatever, well done for coping as you no doubt did to everyone's advantage!
NoD