Small, quick addition at Hood's request.
Source: Chris Gibson & Tony Buttler, British Secret Projects. Hypersonics, Ramjets & Missiles, Hersham 2007, p. 104-119.
Note: not for all of these missiles their actual length was given, so in some cases it had to be calculated through comparison
Already in early 1950s Air Ministry and Air Staff were seriously concerned about possible losses made to Bomber Command's aircraft by Soviet anti-aircraft artillery (and future missiles). Studies commissioned by the Air Ministry at the time showed that before the introduction of ballistic missiles (expected to happen around mid-1960s) the most practical way of reducing vulnerability of RAF's bombers to the Soviet AAA/SAM's was to arm them with stand-off weapons.
Beforementioned study assumed that up to 1960 Soviet air defences would be most effective at altitudes between 1000 and 40000ft (ca. 300-12000m), so until then V-bombers could safely fly at higher altitudes, but after around that date they would become vulnerable again, leaving the airspace up to 1000ft (305m) more or less immune from anti-aircraft fire due to the minimum range of SAMs, short warining times and slow tracking of AAA. The Air Staff sought to exploit by issuing a requirement OR.314/Spec. B.126T, for a low-level bomber, superseded in october 1953 by OR.324, which also laid out a need for a stand-off weapon to further increase the survivability of that bomber. This weapon, called Red Cat, was to meet a separate November 1953 requirement called OR.1125. Handley-Page and Bristol produced design studies for Red Cat, which was topossess a stand-off range of 20nm (37km). The aircraft and weapon were to be in service by 1962.
Handley-Page's Red Cat was to resemble a small, rotund swept-wing aircraft with normal fin and tail surfaces, power being powered by a rocket motor. It's carrier aircraft was to be HP.99 bomber.
Unfortunately the source book does not contain a picture of Bristol's Red Cat, but describes it as being carried semi-recessed but dorsally and raised prior to launch on hydraulic jacks (rationale was that, since the bomber was at low level, the weapon should go upwards).
Problems with development of reasonably efficient guidance system (at a time when Doppler navigation was still in it's infancy) coupled with other design issues meant that OR.324 was cancelled in 1954.
Great Britain, Handley-Page Red Cat
Next step in development of RAF's stand-off missiles was a series of designs done by RAE around mid 1950s and covered by OR.1132 (September 1954), that eventually led to real-life (and much troubled and delayed) Avro Blue Steel.
Mid 1950s intelligence reports about Soviet developments in SAM technology led Air Staff to came up in May 1956 with a new requirement for a stand-off weapon, designated OR.1149. This called for a range of 1000nm (1852km), with the last 100nm (185km) to be flown at low-level. Very ambitious and probably not achievable goal, not least because of problems with guidance (excessive gyro drift wich aerial inertial systems and infancy of Doppler systems).
First proposals for OR.1149 came from the RAE with series of design studies, A to D. All were to be launched from Vulcan and Victor, with Missile A having a conventional layout with an Olympus 21R providing the power. Missile B shared the configuration of the A, but with De Havilland Gyron Junior turbojets on each wingtip. The most interesting, and the study to which most effort appears to have been applied, was a twin DH Gyron Junior powered canard delta called the "1000-mile range flying bomb", that came in two versions: Missile C and D, both sharing the same basic airframe with 18ft (5,5m) wingspan, but of different length (46ft or 14m for Missile C and 50ft6in or 15,4m for Missile D which had increased fuel capacity).
Great Britain, RAE OR.1149 missile designs
Avro initially proposed increasing the fuel volume of Blue Steel, but this was considered unacceptable by the Air Staff, so they created several more sophisticated designs.
Gyron Junior-powered W.107 and Stentor rocket-powered W.109 were based on Avro's 1956 longer-ranegd Blue Steel delta proposal. Both types used highly swept delta wings.
Great Britain, Avro W.107
Great Britain, Avro W.109
Other Avro's designs were largely based on Blue Steel but with various new engine arrangements. Most promising of them, the Z.20 eventually became the W.112 with a stretched Blue Steel fuselage and two alternative engine arrangements. Eventually the project was taken over by English Electric and evolved into what they called the P.10D.
Great Britain, Avro W.112
Great Britain, English Electric P.10D
Vickers proposed to meet OR.1149 with a turborocket-powered weapon called the Type 569, but soon they discovered that turborockets (an engine whose low-speed thrust is produced by employing rocket-driven turbomachinery) lacked the power for acceleration while suffering from high specific fuel consumption, so eventually they were replaced for turbojets. The Type 569 was of convetional layout, with engines on the wingtips. Unfortunately, for centre of gravity reasons, it had to be loaded without fuel and then fuelled in flight from the carrier aircraft's tanks.
Great Britain, Vickers Type 569
Also the Handley-Page produced a design study for OR.1149, called the HP.106. It was novel in couple of ways - it had squat fuselage holding a pair of DH Gyron Junior turbojets fed by a chin intake, it used diesel fuel (becuase it produced greater range as a result of reduced boil-off at the higher temperatures experienced during the cruise) and to allow it to fit into V-bomber's weapons bays it had retractable nose cone.
Great Britain, Handley-Page HP.106
Eventually it become clear that of all these designs only P.10D and HP.106 had any chance of meeting the range requirements (and in turn they suffered from other issues), so by late 1957 emphasis had switched to an early service entry and ease of weapon carriage, leading to OR.1159 in May 1958 that had range requirement reduced to 600nm (1111km) and the low-level phase deleted, allowing also the new weapon to be based on Blue Steel. That eventually led to the Bule Steel Mk.2 design.
Further stages in the whole process were Skybolt and OR.1182 described before (Avro W.140, Bristol X.12/Pandora). Cancellation of these led to a gap in capabilities of British nuclear deterrent and to frantic search for remedies. Of the proposals put forward most were rather small and short-ranged weapons (except for Grand Slam II described before), that could be carried not only by the V-bombers, but also by Buccaneer and TSR.2.
Of these notable were BAC's small designs called commonly "One Club". One Club A and One Club B were essentially unguided WE-177A nuclear bombs with Raven rocket motor, and additionaly four Linnet III boosters and longer body for One Club B. Slightly larger One Club C was an air-launched Bloodhound SAM-turned-AGM.
De Havilland proposed two designs - Hatchet - short range (55nm or 102km) ALBM powered by Foxhound motor from Seaslug, and RG.17 of 19ft (5,8m) length and range of 120-200nm (222-370km). No drawings of these two are shown in my source.
Final (besides Grand Slam's) of that series of proposals were air-launched versions of ballistic missiles - US Polaris and Pershing (to be carried by V-bombers) and of Blue Water missile then under development for the British Army (and ultimately cancelled in 1962) to be carried by TSR.2 (then still under development).
Of these it was possible for me to draw One Club's and Blue Water, but One Club A and B would be rather small at this scale, and to draw One Club C (Bloodhound) and Blue Water it would be better to begin with drawing their "basic" (land based) versions, which is something I'm not prepared to do currently.