Scottish Parliament authorities are "satisfied" no technical error occurred after Labour said a vote cast by their leader failed to be counted.

The party insist Kezia Dugdale voted in a council tax debate which resulted in the presiding officer using his casting vote in favour of the Scottish Government.

A Conservative amendment criticising local government taxation reforms was passed by 64 votes in favour to 63 votes against and essentially replaced the original government-backed motion which praised the changes.

When the amended motion was put to a vote, however, it received 63 votes both in favour and against, forcing Macintosh to use his vote.

Holyrood confirmed the MSP who failed to have a vote registered on the motion as amended was Dugdale.

Presiding officers by convention use their casting votes to back the status quo.

Dugdale's explanation has been rejected by parliamentary authorities.

A spokesman for the Scottish Parliament spokesman said: "We have checked the voting consoles in the chamber. We are satisfied that the system is working properly."

Her spokesman has called for an investigation into the events and insists she did vote.

The party's business manager James Kelly said: "Every Scottish Labour MSP voted against the government today. We have complained to the parliamentary authorities."

The planned reforms will enable councils to raise the rates by a maximum of 3% from April next year.

Homes in the bands E, F, G and H will also have the amount of money they pay increased under the plans.