:bose-x]Its not Class A terminal airspace so no SVFR, IFR only.
well the Vagar TIZ is Class G up to 7500 ft and the Scottish FIR is Class G up to FL 245 so i could fly at say 10,000 ft in the Scottish FIR and then drop down to 7500 ft when i get to SIDER (FIR Boundary)