London, June 24 -- The UK-based Hinduja brothers are locked in a legal dispute in the High Court in England over their billionaire family assets, it emerged in a ruling in London.

The case has been brought by Srichand Parmanand Hinduja, 84, described as the "patriarch" of the family, against brothers G P Hinduja, 80, P P Hinduja, 75, and A P Hinduja, 69, and revolves around the "validity and effect" of a letter dated July 2, 2014.

The letter includes statements to the effect that the brothers appoint each other as their executors, and that assets held in any single brother's name belong to all four. A related second letter, dated July 1, 2014, is also linked to the dispute.

"In summary, SP seeks a declaration that neither document has le...