When doing a family tree, you will need to consider that most internet contacts and information are American in the main.It is only in the last few years that the UK have shown any real interest in this subject.
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There are a number of very good information sources, which you local library should have details.The most advanced world-wide records are held in Salt Lake City via the Mormon Trust.This site as many 'hits' per day, so it can get congested at peak times.
On Tuesday evenings, there is a new programme on BBC 2 called 'Who Do You Think You Are?'.Well worth a look as to the events that can unfold when researching your family history.