Before (end of 1978)
Not known.
After (end of 1979)
Not known.
Ward results
St. Marys3 seats · turnout 74.3%
| V. Guthrie | Conservative | 3,497 ✓ |
| J. Rosenfield | Conservative | 3,465 ✓ |
| J. Makin | Conservative | 3,463 ✓ |
| G. Cohen | Labour | 2,319 |
| G. Smith | Labour | 2,181 |
| N. Shnyder | Labour | 2,102 |
| S. Johnson | LIB | 1,002 |
| W. Rowell | LIB | 936 |
| B. Leahiff | LIB | 832 |
| M. Lynch | Independent | 264 |