GW9 being the modified version of GW7, with Hanger like missile stowage instead of "Deep Stowage" as well as reduced armour thickness (evident in smaller armour tonnage despite longer hull then GW1) I've also moved the aft pair of 40mm AA guns closer to the launcher as I reworked the aft a bit and to protect them from the Sea Slug exhaust I've added blast shields.
The design had the following characteristics:
Dimensions: 149.35m (wl) x 21,34 x 5,41m
Displacement: 9.168tons (full load)
Engines: 30.000shp, Steam Turbines (Probably English Electric Y100), 2 shafts
Range: Unknown probably 15-21.900km at 22km/h (8-12.900nm at 12knots)
Speed: 46km/h (24,8knots)
Armour: unknown probably 51mm Deck over Machinery and Magazines, 51mm Belt over Machinery and Magazines (Missile and Guns)
Armaments:
2x2 3"/70 (76mm/70) QF Mk N1 AA Guns,
4x2 40mm/70 OQF Mk XI AA Guns,
1x2 GWS.1 Sea Slug SAM
Sensors:
2x Type 901 Missile Control/Director Radar
6x Type 903 Fire-control Radar, one for each MRS.3 director
1x Type 960 Air Search Radar
1x Type 974 Surface Search/Navigation Radar
1x Type 982 Air Search Radar
1x Type 983 Height Finder Radar
1x Type 992 Target indication/Surface/Air Search Radar
The datapages:
i.imgur.com/sIuNLrN.jpg