How do I trace long-lost family members in the UK?
Don’t know how much information you have. Do you know their names, and how many of them there are? Do you know your Grandparents names and your Grandmother’s maiden name? I presume you know your Father’s date of birth.The only method I can suggest depends on at least the answer to the last question, and will be a real slog, needing a lot of patience. You may be able to do it free at one of the bigger libraries on Ancestry UK, I don’t belong, so can’t say what is available. There may even be an index there. The Family Records Office at Islington is shortly joining the National Archives at Kew in the New Year, so is only offering a limited service at the moment. What I would do is 1) Get a birth certificate for your Father if you don’t know Grandparents’ names/ maiden name. Then 2) this is the boring bit. Go to National Archives, at Kew, after the merger and work your way through the indexes to find the birth of his siblings. This will take a long time, there are 4 indexes per year, one