Several meetings were held between former Northern Ireland secretary Peter Mandelson and the Hinduja brothers to discuss their naturalisation, SP Hinduja's former aide alleged on Friday.

Speaking on the BBC Radio 4 Today programme, Darin Jewell claimed to have drafted agendas for the meetings, in which the subjects of the millennium dome, which Mandelson was responsible at the time, and their British passports were tabled.

"From memory I think there were 12 or 13 items on that list, one of which was the dome obviously, and one of which was naturalisation, there was a whole series of other issues," he said.

"There were a number of things on that agenda. The top of the agenda would have been the thing, the issues most close to SP's heart. So I do remember naturalisation was top of the agenda."

He also gave details of follow-up meetings with similar agendas, held at the department of trade and industry when Peter Mandelson was secretary of state there.

Although he did not attend the meetings himself, Jewell has offered to give the evidence to the Hammond inquiry. He told the BBC that he had done so in the previous inquiry and was "surprised" not to have been contacted subsequently.

Jewell went on to accuse Mandelson and chair of the inquiry into the affair, Sir Anthony Hammond, of actions which "led to this sort of veil of secrecy that has tainted the Hinduja name."

Mandelson, talking to the programme though declining to be interviewed, urged him to hand in the information if it was relevant.

Norman Baker, the Liberal Democrat MP whose questioning led to Mandelson's second resignation, questioned the basis on which the prime minister had ordered Hammond to review his original findings.

"The terms of the new inquiry, set up by the prime minister, are very narrow indeed. The inquiry appears to be set up to look at any papers Mr Mandelsonproduces, but not at any evidence produced by Darin Jewell," he said.

"If the purpose of the reopened inquiry is to get to the truth then Sir Anthony Hammond should examine the new papers and he should talk to the Hinduja brothers.

"If the purpose of the inquiry is to rehabilitate Mr Mandelson, or to sweep the whole thing under the carpet, then that will do the prime minister no good at all," Baker warned.