| C/N | Mod | Built | ID In this Organisation | In other Org |
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| s2/5311 | | 1959 | XP166: Reworked from P.531-2 to pre-production version of Scout AH.1 as XP166 during 1960. For further information, see under Westland Scout.
|  G-APVL: P.531-2 as second tranche of prototype, with 1050shp Bristol Siddeley Nimbus engine derated to 635shp. ff 9 Aug 1959. To UK Army Air Corps for trials.
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| s2/8444 | | 1961 | XR436: Reworked from P.531-2 to pre-production version Scout AH.1 at Hayes during 1962. For further information, see under Westland Scout.
| XR436: P.531-2 built at Hayes, for evaluation by Indian Government. ff Feb 1962. Indian interest waned and airframe diverted for modifications to pre-production Scout AH.1 at Hayes in 1962.
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| s2/5312 | | 1959 | XR493: Reworked from P.531-2 to pre-production version Scout AH.1 at Hayes during 1960. For further information, see under Westland Scout.
| G-APVM: P.531-2 built at Eastleigh as second tranche of prototype, with de Havilland Gnome H.1000 turbine derated to 685shp. ff 3 May 1960. Converted to pre-production Scout AH.1 at Hayes in 1960.
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