Complex sentence: Due to an administration error the registry office was found to be unlicenced from October 2004 to March 2005 with around 80 marriages affected; although all were later found by the High Court to be legally valid.
Split into simpler sentences: Due to an administration error the registry office was found to be unlicenced from October 2004 to March 2005 with around 80 marriages affected. Despite the error, all were later found by the High Court to be legally valid.