Formed under the Poor Law Amendment Act of 1834 in 1836. Parishes covered were Acton, New Brentford, Chiswick, Ealing, Greenford, Hanwell, Heston, Isleworth, Perivale and Twickenham, with West Twyford a later addition. More information on the AIM25 webpage [1]. The archives are at the London Metropolitan Archives.