Avro WS606A

[Triton]

Artist's impressions of Avro Weapon System 606A.

Source: http://www.laesieworks.com/ifo/lib/AVRO-WS606A.html

 

[XP67_Moonbat]

IIRC, I read somewhere that the fuselage was based off the Arrow.

 

[Grey Havoc]

It would appear that, if the program hadn't fallen victim to both budgetary and political shenanigans, the version depicted in the first image would have being the most likely to have been flown, as a proof of concept aircraft.