Thanks everyone for your efforts. May be I'm heading in the wrong direction with this Sherwood Pearson (although it seems to be a family name carried down through each generation).
Forward a generation I have a definite lead - Luke Sherwood Pearson b.1867, Nunnington, Yorks. It's his parents I would like to trace.
There is a Luke Pearson b.1867 on 1871 census - a 'border' with his grandmother - Mary Pearson, who is also a 'border' at Middleton Lane, Middleton St George, Durham. They are also on the 1881 census at the same address and now with his g.father Luke Pearson.
On 1851 census I find these Luke and Mary Pearson with Sherwood Pearson b.1841 at Nunnington. This is where I got my original Sherwood from!!
Many thanks, Beca