Greater Manchester has the highest number of unclaimed prizes

An appeal is being made to track down bond holders to reunite them with cash prizes ranging from �25 to �1,000.

There is �920,000 in unclaimed cash in Greater Manchester, more than �500,000 in Merseyside, �475,000 in Lancashire and �325,000 in Cheshire.

National Savings and Investments (NS&I) said many people forget to inform them when they change address.

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There is no time limit on collecting prizes and the Blackpool-based savings provider holds the funds until the winner can be tracked down.

The oldest unclaimed prize dates back to 1957.

Sally Swait, Premium Bond manager, said: "With the stress of moving home, it is all too easy to forget to tell everyone your new address.

"For North West's Premium Bond holders, they could literally be walking away from their prizes if they have not kept NS&I updated."