Hi,
I notice this thread hasn't been active for a while, but I need some assistance.
I have noticed my GG-Grandparents are listed on this database, and would like to know where the information has been sourced from if possible (places of birth in particular). The only info I have is from UK records (census, naturalisation and marriage certs), and having searched on Ancestry.com and FamilySearch it appears my ancestors did not exist before arriving in the UK, even going by the information posted on this website!