Oysters from Edinburgh's Firth of Forth were once considered to be some of the best you could buy. At its peak the Edinburgh oyster industry produced over 30 million oysters a year and exported them across Europe.

That all came to an end when the Forth oysters were wiped out by over-fishing and pollution. Now it seems that they might be back.

Dr Elizabeth Ashton of Stirling University has discovered wild oysters in the Firth of Forth. She believes it might be possible to re-establish the colonies, possibly taking them back up to a level where commercial fishing once again becomes viable.

The exact location of the oyster discovery has not been revealed.