Former owner of the Daily Telegraph Conrad Black and long-time business partner David Radler have resigned as officers and directors of Ravelston Corporation, the private holding company behind the troubled Hollinger media empire.

The sale of the Daily and Sunday Telegraph newspapers is expected to be sealed today.

Newspaper publisher Hollinger International has won a judgement from a Delaware court against its former chief executive, ex-Daily Telegraph boss Conrad Black.

Embattled Conrad Black is to appeal against a ruling in a US court blocking a deal to sell control of his newspaper empire, which includes The Daily Telegraph, to British businessmen, the Barclay brothers.