Gosh this is a tough one isn't it.
Can't find anything that leads me to Wright or Gillibrand for Thomas.
Theres a TOM WRIGHT died 1964 Nottingham aged 82.
As for the Causey children. Seems they were the children of William Causey & Louisa Lorne Gibson.
William seems to have died 1908 age 34. He was a Manager of Public houses on the 1901. So maybe they just worked together & Thomas took the care of the children on.
Gerald Causey 1897
Florence Ambrosine Causey 1903.
Stanley Causey 1904.
All born Wigan. mums maiden name Gibson.
Possible marriage for Stanley 1936 Wigan to a Irene D S Hooson.
Another bit of info I found was a marriage 1845 St Paul Withnell Preston for a Jane Wright to William Gillibrand.