An investigation has been launched into claims that there is "insufficient evidence" that the results of London elections were accurate.

The London Assembly Elections Review Committee will question individuals and institutions responsible for administering May's vote and count at a City Hall meeting on July 17.

The Open Rights Group, which raised concerns about the way the poll was conducted, will also give evidence.

Returning Officer Anthony Mayer and Indra, the contractor responsible for electronic counting, will be questioned over claims that 41,000 ballots cast in the GLA elections were unaccounted for'.

Elections Review Committee Chair Brian Coleman said:"The charge that voters have been denied their constitutional right is very serious and one which must be backed up by firm evidence.

"My committee will examine in detail the claims of the Open Rights Group and hear from the election administrators at our meeting on July 17.

"If there have been problems in the conduct of the poll we will not hesitate to make firm recommendations to ensure voters in London can have confidence in the electoral process in the future.

"Equally the methodology used by the Open Rights Group to challenge the accuracy of results will be tested and exposed if found wanting."