What Rocket Am I?: Quiz 20

Clue 1: I was first successfully launched in 1971.
Clue 2: I was developed by Westland Aircraft.
Clue 3: I use peroxide/kerosene propellants.
Clue 4: I am the United Kingdom's only orbital launch vehicle.
Clue 5: My payload to low Earth orbit is 66 kg.
Clue 6: I launched the Prospero satellite.
Clue 7: I stand 13 meters tall.

Yes, I am Black Arrow.

I was canceled after my successful launch, ending UK's independent orbital capability.