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The part of the No. 5 or Hackney Ward of Hackney Parish south of the centres of Everning Road, Upper Clapton Road, and the Upper and Lower Clapton Roads.
The part of Clapton Park Ward to the south of a line drawn along the centres of Glenarm Road, Glyn Road and Redwald Road to its junction with Maclaren Street, thence across the recreation grounds in Daubeney Road to the borough boundary at a point fifty feet north of a boundary post situate at the junction of the Waterworks River with the River Lea at Lead Mill Point.
1950 - 1955
Under the Representation of the People Act 1948 the Boroughs of Hackney and Stoke Newington jointly formed two seats, the borough constituencies of Stoke Newington and Hackney North and Hackney South. Hackney South was enlarged: consisting of the Metropolitan Borough of Hackney except the five wards of Leaside, Maury, Southwold, Springfield and Stamford.
Redistribution
Following a review of constituencies by the Boundary Commission appointed under the House of Commons (Redistribution of Seats) Act 1949, parliamentary seats in the metropolitan boroughs of Bethnal Green, Hackney and Stoke Newington were redrawn. The Hackney South constituency was abolished, with most passing to a new Hackney Central borough constituency, and some parts to Bethnal Green.