Hi Terry
CH aviation states
FlairJet (United Kingdom) (FLJ, Oxford Kidlington) doing business as Sirio UK has added its first Embraer Legacy 600, a derivative of the E135 in a business jet configuration, ch-aviation research has revealed.
Also per the G-INFO website it gets murkier owned by Flexjet and operated on the AOC of Flairjet operating as Sirio UK so I think I will detail them as Flexjet/Sirio UK
Thanks
Alan