Hello and welcome to Just Answer !
I would start by contacting The British Bible Society, finding out the exact age of your Bible.
www.biblesociety.org.uk/
If they have no other suggestions after you find out the age, then I would contact a antique store that deals with old Bibles. If you have the exact age it will help.
Most the time Bible's are only worth whatever it is in sentimental value, but sometimes there will be something that holds it apart from other Bibles to make it different and will be worth more.
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Danny
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