Frostfreed has the right idea.
Most of the trees on Ancesatry are rubbish anyway - at least the hundreds of trees claiming to have relatives of mine on them.
Proper Family History research requires that you locate and examine the sources of every entry yourself. Just grabbing junk lists of namnes from Ancestry is another game altogether. To be certain that you have the correct ancestors you MUST see the BMD certs and the Parish Records (or DEFINITE images of them) YOURSELF.