Editing Vickers Wellington (section)

===Bomber variants===
[[File:British WW2 medium bombers comparison.png|thumb|Scale [[comparison diagram]] of the trio of British twin-engined medium bombers at the outbreak of the Second World War: Wellington (blue), [[Handley Page Hampden]] (yellow) and [[Armstrong Whitworth Whitley]] (pink).]]
;Type 271: The first Wellington bomber prototype.

;Type 285 Wellington Mark I: One pre-production prototype. Powered by two [[Bristol Pegasus]] X radial piston engines.

;Type 290 Wellington Mark I: The first production version. Powered by two 1,000&nbsp;hp (750&nbsp;kW) Bristol Pegasus XVIII radial piston engines. Fitted with Vickers gun turrets, 183 built at Weybridge and Broughton in Flintshire.<ref name = "andrew 16"/>

;Type 408 Wellington Mark IA: Production version built to B Mark II specifications with provision for either Pegasus or [[Rolls-Royce Merlin]] engines, although only 1,000&nbsp;hp (750&nbsp;kW) Pegasus XVIII engines were used in practice.<ref>Andrews 1970, pp. 44–56.</ref> Main landing gear moved forward 3&nbsp;in (8&nbsp;cm). Fitted with [[Nash & Thompson]] gun turrets. 187 built at Weybridge and Broughton in Flintshire.<ref name = "andrew 16"/>

;Type 416 Wellington Mark IC: The first main production variant was the '''Mark IC''' which added waist guns to the Mark IA. A total of 2,685 were produced. The Mark IC had a crew of six: a pilot, radio operator, navigator/bomb aimer, observer/nose gunner, tail gunner and waist gunner. A total of 2,685 were built at Weybridge, Broughton in Flintshire and Blackpool.<ref name = "andrew 16"/>
[[File:Vickers Wellington Mk2.jpg|thumb|Merlin-engined Wellington Mark II of [[No. 104 Squadron RAF|No. 104 Sqn.]] The criss-cross geodetic construction can be seen through the perspex panels in the side of the fuselage.]]

;Type 406 Wellington Mark II: The '''B Mark II''' was identical to the Mark IC with the exception of the powerplant; using the 1,145&nbsp;hp (855&nbsp;kW) [[Rolls-Royce Merlin]] X engine instead. A total of 401 were produced at Weybridge.<ref name = "andrew 16"/>

;{{visible anchor|Type 417 Wellington B Mark III}}: The next significant variant was the '''B Mark III''' which featured the {{convert|1375|hp|kW|0|abbr=on}} [[Bristol Hercules]] III or XI engine and a four-gun tail turret, instead of two-gun. A total of 1,519 Mark IIIs were built, becoming mainstays of Bomber Command from late 1941 through into 1942, with all but the two prototypes being built at Broughton in Flintshire and at Blackpool.<ref name="vickp334-5">Andrews & Morgan 1988, pp. 334–335</ref><ref name="delp490">Delve 1998, pp. 49–50</ref> After trials in 1942, the Wellington III was cleared to tow Hotspur, Hadrian and Horsa gliders,<ref name="vickp334">Andrews & Morgan 1988, p. 334</ref> although this was observed to have an adverse effect on the geodetic structure.<ref name="bowp47">Bowyer 1986, p. 47</ref> The Wellington III was also seen over Salisbury Plain while towing Spitfires. This would have allowed Spitfire reinforcements for the defence of Malta to be towed from Gibraltar to within range of Malta before being released. Whether this was done is unconfirmed.<ref name="vickp334"/>

;Type 424 Wellington B Mark IV: The 220 '''B Mark IV''' Wellingtons used the 1,200&nbsp;hp (900&nbsp;kW) [[Pratt & Whitney Twin Wasp]] engine and were flown by two [[Polish Air Force|Polish]] and two [[RAAF]] squadrons. A total of 220 were built at Broughton in Flintshire.

;Type 442 Wellington B Mark VI: Pressurised with a long wingspan and 1,600&nbsp;hp (1,190&nbsp;kW) Merlin R6SM (60-series, two-stage) engines, 63 were produced and were operated by [[No. 109 Squadron RAF|109 Squadron]] and as [[Gee radio navigation]] trainers. A total of 63 were built at Weybridge. Fitted with Sperry bombsight.{{Sfn|Bowman|2011|p=123}} The B.VI's high-altitude fuselage design optimised for pressurisation had a solid, bullet-like nose with no nose turret, and a cockpit with an astrodome-like [[bubble canopy]]. The rear turret was a remotely operated FN.20 sighted from a dome in the cockpit.{{Efn|The original design included a pressurised rear turret but Parnall were not able to deliver the FN.70.}}<ref>Clarke 1993 p. 123</ref> This is the aircraft that spurred [[Rolls-Royce Limited|Rolls-Royce]] into developing the two-stage supercharged [[List of Rolls-Royce Merlin variants|Merlin 60-series]] engine.

;{{visible anchor|Type 440 Wellington B Mark X}}: The most widely produced variant of which 3,804 were built. It was similar to the Mark III except for the 1,675&nbsp;hp (1,250&nbsp;kW) Hercules XVIII powerplant. The Mark X was the basis for a number of [[Coastal Command]] versions. A total of 3,803 were built at Broughton in Flintshire and Blackpool.