Snippets from Flight magazine.
7 April 1966: Quoting General Martin, CoS of the AdlA, the AFVG was to have a ferry range of 3,100 miles. No configuration or other specs mentioned.
16 Jan 1967: AFVG in RAF service to be able to undertake "about 80%" of F-111K missions, whilst weighing under 50,000lb for land operations. French carrier version MTOW 40,000lb. M45G-10 bypass ratio 3:1, PR 24:1, thrust 7,000lb dry / 12,000lb wet, infinitely-variable reheat. High-alt recce radius to be 1,000nm. Fly-away cost £1.5 to £1.7 million, or 40 million Francs ( £2.3 million ) with spares and GSE.