The magnum is believed to be one of only 12 ever produced

The magnum sold for �1,050 after failing to reach its reserve price on Wednesday at Swindon's Dominic Winter auction house.

The magnum was recently retrieved from a dusty attic in Luton, Bedfordshire.

Chris Albury, from the auction house, said: "A man just called out of the blue and agreed a price of �1,050. He's a genuine collector."

The limited edition Cuvee Dom Perignon 1961 vintage was selected as it was the year of the bride's birth.

It is understood that 99 bottles of the vintage - regarded as one of the finest ever produced - were shipped across from France's Champagne region for the wedding.

Six were delivered to the royal household, the rest were presented as gifts to drink trade charities.