Here's what I have re William Laing and Margaret Vardy
1. Laing, William (b. 1838 - Scotswood, Northumberland, England, d.
26-Nov-1874 - Sunderland, Durham, England)
sp. Vardy, Margaret (b. 1832 - Whalton, Northumberland, England, d.
1924 - Sunderland, Durham, England), m. 1858-08-16 - Whalton,
Northumberland, England
2. Laing, Charles William (b. 1859 - Bishopwearmouth, Durham,
England, d. 1936)
sp. Waddell, Isabella (b. 1857 - Dunse, Berwickshire, Scotland, d.
22-Feb-1941 - Hardwick Castle Eden, Durham)
2. Laing, Alfred (b. 1861 - Sunderland, Durham, England, d.
12-Dec-1896 - Sunderland, Durham, England)
sp. Gibson, Frances Agnes (b. 1865-07-18 - Markinch, Fife,
Scotland, d. 1957-01-20 - Edinburgh, Midlothian, Scotland), m.
1888 - Markinch, Fife, Scotland
2. Laing, Robert Vardy (b. 1863 - Sunderland, Durham, England, d.
Sep-1908 - Sunderland, Durham, England)
sp. Lambert, Minnie Osborne (b. 1869), m. 1887 - Sunderland,
Durham, England
2. Laing, Samuel Buck (b. 1864 - Bishopwearmouth, Durham, England, d.
1864 - Bishopwearmouth, Durham, England)
2. Laing, Ann Buck (b. 1866 - Sunderland, Durham, England, d. 1929 -
Sunderland, Durham, England)
sp. Plank, George Delmar (b. 1847 - Sunderland, Durham, England,
d. 1926 - Bishopwearmouth, Durham, England), m. 1894-06-06 -
Bishopwearmouth, Durham, England
2. Laing, Margaret Vardy (b. 1867 - Sunderland, Durham, England, d.
1954 - Sunderland, Durham, England)
2. Laing, Caroline (b. 1870 - Sunderland, Durham, England, d. 1891 -
Sunderland, Durham, England)
William Laing was a Wine & Spirit Merchant in Sunderland. His sons were also in this business (Laing & Co and Laing Bros.). His parents were both from Scotland.
It also looks like one of Margaret's brothers (John Edward Vardy b. 1830) married one of William's sisters (Margaret Thomson Laing b. 1835) at about the same time. The marriage took place Houghton-le-Spring, Durham.
Hope this helps. I have further info on later generations. Please let me know if you need anything else.