Tracing lost inheritance

My granddad passed away over 10 years ago and I remember my nana mentioning that he had set me up a bank account when I was first born. my mum and dad also remember this, however my nana's memory is no longer as good as it used to be and does not remember. Is there any way of me finding out if there is still a bank account for me? If so will it still be active for me to access the money in it.

Please help!
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