The father in the census from 1851 is definitely Charles Thomas Trew, the children match my research.His wife is Caroline (not Catherine) but this is a reasonable error on a census I think. I have the marriage of Charles Thomas Trew and Caroline Snead 7 August 1843.
From this I got father William Trew .Address at time of Charles Thomas Trew's marriage: 20 Theberton St Occupation - cloth presser
A William Trew aged 75 died at Mile End, London in 1866 - Is this our William.He would have been born about 1780.
Charles Thomas's children, Charles Walter b. 1844; William Francis b. 1845 and James Alexander b.abt. 1848.The names Walter and Francis seem to appear on many Trew postings so am hoping for a link back.We are descended through William Francis' daughter Clara Ada Trew b. 1878