Charles' wedding set to end up in court

The Daily Express said an investigation into the marriage is expected to be referred to family law judge Dame Elizabeth Butler-Sloss to test whether the civil wedding at Windsor Guildhall is legal.

Other challenges have effectively put the April 8 ceremony on hold, it said.

The register office service is overseeing the inquiry in which Butler-Sloss, president of the High Court family division, will be consulted informally by England's Registrar General Len Cook.

Legal experts said that depending on the outcome of the discussion, the dispute may be referred to the court for a ruling, the newspaper reported.

There is also a chance that any decision will be challenged in a High Court judicial review, threatening to delay the wedding, the Daily Express said.