Hi there, I think we may have talked before.I recognise those initals of yours...but just incase you don't have this... This may be your family in the 1861 Census.Of all the LEYLANDS I wrote down (hunting for the ones that connect to BRADBURY and WILKINSON) this was the only William of the right age and the Thomas seems to fit too.
1861 Census St. Helens:
138 Moor Flat LEYAND, William 29,Elizabeth 26,Mary 5, Thomas 3, Margaret 3mo. - all born Windle, St. Helens. Shelley