Is there not a procedure in the UK for declaring minimum fuel, as opposed to fuel emergency? If one had used the expression "minimum fuel" a few frequencies back,
Due to the tortueous nature of the internet I cant put my hand on the Pink (safety) AIC that covers this but to surmise the UK do
NOT recognise phrases such as "minimum fuel" "fuel priority" or similar. You either have enough fuel or you declare an emergency.
The theory behind this (AFAIR) is that in a cut throat business we are all carrying minimum fuel anyhow and if one operator thought that it could load a few kilos less and then cry priority every time it came in it would gain an unfair commercial advantage. Whereas "Pan" and "mayday" will trigger a formal investigation and a paper trail allowing the CAA to track these problems.