Road that runs south-eastwards from junctions with Streatham Road and London Road, twoards Eastfields Road. It was named after Lock’s Farm, at the Figges Marsh end, according to J.D. Drewett, in his ‘Memories of Old Mitcham’.
In this OS map from 1893, the part now called Eastfields Road is shown as Tamworth Lane:
These street directories describe the road from Figg’s Marsh:
1896
George DAVIS, greengrocer
2, Mrs Rhoda GILBERT, laundressGrange Villas:
1, James NEW
4, John W. BEARDWELLPrimrose Cottage, James MIZEN
Note that what is today called Eastfields Road was once part of Tamworth Lane and hence the Primrose Cottage listed in Lock’s Lane is the same as the one in Eastfields Road.
1904-5
Henry WOODS, pig dealer
2, Mrs Emma SCHMIDT, laundress
James FLEMMING
Charles WELLER
Clement BELCHER
Richard TOOGOOD
Edward THUMWOOD, carman
1910-11
The Mitcham Steam Laundry Co.
Henry WOODS, pig dealer2, Robert John BULL, laundry
Clement BELCHER
Thomas DAVIS, decorator
Richard TOOGOOD, confectioner
George William TURNER, carman
1915
This directory disagrees with the 1914 electoral register that has Toogood and Rosemary Villas in Eastfields Road.
John HARDING, laundry
The Mitcham Steam Laundry Co.… here are Carew & Lansdell Roads
Mrs H. TOOGOOD, confectioner
Rosemary Villas:
10, Charles WILSON
9, John GODDEN
8, James SULLIVAN
7, George HEPWORTH
6, Henry WOODS
5, Edwin LUMB
4, John Frederick WADE
3, Andrew DUNNING
2, Samuel AULT
1, William BENSTEADGeorge William TURNER, carman
The 1925 street directory describes the road as from Streatham Road to Eastfields Road:
John F. RENSHAW & Co. Ltd., almond specialists
Brookborough Cottages:
John Frederick SCOTT
William EDWARDSVine Cottages:
2, Walter MILLER
1, Mrs PENNIGERMarsh Cottages:
2, Joseph BATES
1, Thomas Joseph WOODING, verger St Marks, Upper Mitcham
St. Mary’s (Balham) Social & Lawn Tennis Club (H.G. Brightwell, hon. treasurer)
Star Laundry (J.J. HARDING, proprietor)
Thomas TRICKER
The 1935 OS map shows that Marsh and Firtree Avenues have now been built off the south side of Locks Lane. The confectionaery factory shown is that of John F. Renshaw, which made marzipan and supplied almonds for cakes etc.
References in Newspapers

WANTED, by a Respectable Young Man, regular employment of any kind ; not with horses.— Apply, W. B., 11, Lock’s Lane, Mitcham.
World War 1 Connections
Private William Henry Tricker