Chatting with a couple of members of the congregation at the beautiful St. Mary’s Wanstead, I wondered whether the parish boundary included the Wanstead Slip, that curious parcel of land on the other side of Wanstead Flats around Cann Hall, Leytonstone. They weren’t sure, and asked for further explanation about what exactly the Wanstead Slip was and how it came to be, and I had to admit I wasn’t sure.
Thankfully, A History of the County of Essex: Volume 6, published by Victoria County History in 1973 has this note on the Wanstead Slip:
“Wanstead lies about 7 miles north-east of the City of London. (fn. 1) It is a dormitory suburb straddling the arterial road to Southend and Colchester and forming part of the London borough of Redbridge. The ancient parish extended from Wanstead Flats north for about 4 miles to the boundary with Woodford. The western boundary marched with Leyton and Walthamstow, and the river Roding formed the eastern boundary. The south-west of the parish comprised a spur called the Wanstead Slip which ran south of Leyton down to the marshes near Temple Mills, and included a small detached part locally situated in West Ham. This was more or less coterminous with the manor of Cann Hall, which was originally in Leyton but appears to have become part of Wanstead by the early 13th century. (fn. 2) The main body of the Wanstead Slip (207 a.) was merged in Leyton sanitary district in 1875 and was constituted a separate civil parish (Cann Hall) in 1894. (fn. 3) The detached part of the Slip (38 a.) was merged in West Ham local government district in 1875. (fn. 4) In the same area a small adjustment of the boundary between Wanstead and West Ham had been made in 1790. (fn. 5) In the south-east corner of the parish Aldersbrook appears to have been transferred from Wanstead to Little Ilford early in the 16th century. (fn. 6) That substantial change evidently took place without legal formalities and caused boundary disputes at later periods. (fn. 7) Later boundary changes included the transfer of 96 a. of Wanstead Flats to East Ham in 1901.”
And there is a further reference in A History of the County of Essex: Volume 5, in an article on the Hundred of Becontree:
“Domesday Book lists some 19 estates in Becontree hundred, containing 104 hides in 10 villages distinguished by separate names. (fn. 1) Most of these villages later gave their names to the parishes of the hundred, but there were some exceptions. Ham was subsequently split into the two parishes of East Ham and West Ham. Higham later became part of Walthamstow parish. One of the estates in Leyton later became Cann Hall in the neighbouring parish of Wanstead, forming the anomalous ‘Wanstead slip’. Dagenham, which certainly existed in 1086, and which became a separate parish, is not named in Domesday, no doubt because it was then, as later, part of the manor of Barking.”