The Six Nations is to receive details on Friday of a third multi-million pound offer as bidding for the game’s prize assets intensifies, The Daily Telegraph can reveal.

World Rugby launched its own salvage mission in Dublin on Thursday, unveiling a £5 billion Nations Championship project that will guarantee at least a £10 million uplift per year to each of the 12 competing unions over the next dozen years, with the hope that it will head off a rival £500 million bid by CVC to the Six Nations.

There is little doubt that there is a scramble to secure rugby’s future, with World Rugby hoping that it has put enough on the table to persuade the sceptical Six Nations’ unions that it has the commercial clout to compete with other interested parties.

However, The Telegraph understands that the Six Nations is to be presented with a £1.75 billion investment proposal by the International Management Group, one of the world’s leading sports agencies, which will look to be pliable in its relationship with the European governing body so that it might have a global reach, too. A competition format is yet to be discussed, although it will include all the world’s leading nations. The money matches other bidders.