Westminster's attempt at greater transparency on MPs� expenses has hit a mysterious roadblock after it emerged that a committee chaired by John Bercow, the new Commons Speaker, quietly shelved the official list of repayments.

Westminster's attempt at greater transparency on MPs' expenses has hit a mysterious roadblock after it emerged that a committee chaired by John Bercow, the new Commons Speaker, quietly shelved the official list of repayments.

Last month, the Members Estimate Committee, which oversees MPs' pay and allowances, published a list showing that in the wake of the expenses scandal, members had paid back nearly £500,000.

Figures announced yesterday showed that 264 MPs from all parties had repaid £642,728 since April 1, but the total comes with no breakdown of who has paid what.

The list on the Commons website went up for just 24 hours and was suspended after "a couple" of administrative mistakes.

In fact, the list included some MPs who should not have been included because their repayments were not connected to the expenses scandal.

A notice went up on the parliamentary website saying the list was "being updated".

Last week, a spokesman for the committee suggested that it would reappear this week in its newly updated form. Yet references to the list have now been removed.

The Herald asked when it was due to go back online and was told by the spokesman: "There are no plans to put it back up. No decision has been made to restore it."

Asked why there were no plans to restore it in an updated form, he said: "I can't really go into the reason. I don't think I can tell you."

When it was suggested that this all sounded mysterious, the spokesman replied: "Yes." He explained the list was put up after a Freedom of Information request and that "the requester has got it".

Asked if the updated version might never appear, the spokesman replied: "All possibilities are open. No decision has been made."

Among those who gave money back were: lGordon Brown - £800 - to rectify "inadvertent errors or for the avoidance of doubt"; lDavid Cameron - £947 - who claimed for the removal of wisteria from his home; lDouglas Alexander, the International Development Secretary - £12,600 - who claimed for his constituency home while receiving rent on it from a tenant living in an annexe; lPhil Hope, the health minister - £42,000 - who claimed for furniture, fittings and household items, and lElliot Morley - £20,000 - who claimed £16,800 for a "phantom mortgage".

The committee is due to meet on July 20. Asked whether the updated repayment list would be on the agenda, the spokesman said: "We don't know yet."

David Cameron, in seeking to set the political pace on contrition, got 90 of his Conservative MPs to repay a total of £350,000. The repayments of the Opposition front bench were published and now Tory expenses are regularly updated on the party website.

Last night, Westminster was reminded of the capacity of the expenses scandal to continue to cause waves when it was announced that George Osborne is to face an investigation by the parliamentary standards watchdog.

Laurie Burton, chairman of the local Labour party in the Shadow Chancellor's constituency of Tatton in Cheshire, lodged a complaint over Mr Osborne's mortgage arrangements.

It is alleged the Tory frontbencher took out a home loan of nearly £5000 more than the reported price of his house and claimed Commons allowances to cover interest payments on the whole debt.

Mr Osborne, who denies any wrongdoing, said that he was "relaxed" about the probe.

John Lyon, the standards commissioner, said he would not launch an inquiry into Mr Burton's other complaint: that the Shadow Chancellor "flipped" his second home and avoided paying capital gains tax. "This is a matter for HM Revenue and Customs ", he told Mr Burton.

Meantime, the commissioner's office said Mr Lyon was dropping a complaint against Alistair Darling made by a constituent over claims the Chancellor "flipped" second home designations four times in four years to maximise his expenses.