So to sum this up for the OP...
There are plenty of aircraft around these days capable of “doing a Trident”, and Edinburgh can support such operations....however setting up the ground side these operations can take time and if fog rolls in unexpectedly (which is why I wondered about the TAF/forecast) disruption/diversions can happen.....
So, guessing aside, Wonder if we will ever get the full picture from e.g. someone in ATC?