- [S111] Civil Registration Birth Indexes, General Register Office, (1837-;), birth registration of Colin E. Lawcock, Goodlad, Doncaster 9c 1492, December quarter 1916 (Reliability: 2).
- [S114] Debt of Honour Register, Commonwealth War Graves Commission, (www.cwgc.org;).
commemorating Colin Edward Lawcock, Driver, 9th Indian Division Signals, Royal Corps of Signals, age 28; date of death: 23/02/1945; service no: 153993; grave/memorial ref: Column 46, Singapore Memorial, Kranji War Cemetery, Singapore. The Singapore Memorial bears "the names of over 24,000 casualties of the Commonwealth land and air forces who have no known grave. Many of these have no known date of death and are accorded within our records the date or period from when they were known to be missing or captured. The land forces commemorated by the memorial died during the campaigns in Malaya and Indonesia or in subsequent captivity, many of them during the construction of the Burma-Thailand railway, or at sea while being transported into imprisonment elsewhere."
- [S113] Civil Registration Marriage Indexes, General Register Office, (1837-;), marriages of Leonard Lawcock and Lily L. Goodlad share reference Doncaster 9c 1462, September quarter 1910 (Reliability: 2).
- [S113] Civil Registration Marriage Indexes, General Register Office, (1837-;), marriage of Colin E. Lawcock and Doris M. Smith, Don Valley 9c 2775, September quarter 1940 (Reliability: 2).