From the Wikipedia page 
Yiewsley and West Drayton was an urban district in Middlesex.
It was formed in 1911 from the parish of Yiewsley, formerly part of Uxbridge Rural District. This rural district was abolished in 1929, and Yiewsley was joined by the parish of West Drayton, resulting in a change of name for the district. The parish of Harmondsworth was added in 1930 from the disbanded Staines Rural District.
The archives are held by Hillingdon Local Studies, Archives and Museums Service