Can we have our castle walls back? That is the tongue-in-cheek question to be put by Wallingford mayor Theresa Jordan to the Royal Family as part of Wallingford's celebrations to mark the 850th anniversary of the town's charter.

The walls of Wallingford Castle were torn down by Oliver Cromwell after the English Civil War. Stones and lead were shipped down the Thames to be used in extensions to Windsor Castle.

Now the mayor is to ask for them back. One of the charter festival organisers, deputy mayor Lynda Atkins said: "It's all a bit tongue-in-cheek, but we want to make the journey down the Thames and get either a token stone to bring back or a formal refusal. It should be good fun."

The history of Wallingford Castle to its destruction after the Civil War will be detailed as part of the festival by local historian Judy Dewey.

Only fragments of the castle walls remain. They were recently repointed to make sure they stay upright.

There is a royal theme to the planned celebrations which will take place throughout next year.

The Prince of Wales is being asked to join the celebrations, possibly to unveil a statue of Wallingford lawyer Judge Blackstone. His Commentaries on the Laws of England were the foundation of the American Constitution, and American lawyers are being asked to contribute to the memorial.

Prince Charles will also be asked to unveil a large patchwork quilt which will detail the history of the town since the granting of the charter.

The organisers also want to recruit 850 volunteers for the Antony Nolan bone marrow appeal, and have an 850 strong conga through the town. Other events planned include a classic car rally, a specially brewed charter beer and church concerts.