Not really off topic given how much effort it took me to establish the avgas situation...
A lot of people have told me to fly (and refuel) via Figari. The issues with that appear to be:
1) Inbound: a delay at Figari could push the arrival at Oristano past its closing time (which I have not yet managed to establish, due to the airport not replying to emails, faxes or AFTN messages, but it no longer matters).
2) Inbound: Oristano is VFR-only and sub-VFR weather would result in a diversion to a non-avgas airport - except Cagliari which is pretty well strictly PPR, though I am sure would accept a mayday arrival, and a non-issue of a landing clearance by the filed alternate
is a legitimate mayday
And a diversion to a non-avgas airport would possibly result in a flight to Cagliari anyway the following day, without the "benefit" of an emergency situation and thus exposing one to the full PPR requirement, which is a helluva lot easier to sort out when still at home on ADSL
3) Outbound: hard pushed to make the UK before closing time, if refuelling at Figari.
4) Any refuel/turnaround delay at Figari would result in a hotel for 3 which would wipe out the fuel cost savings.
Time to get myself a turboprop