(Update) Prudential's proposed deal to acquire AIA appears doomed after AIG refused its revised offer of $30.375bn.
F&C intends to vote against Prudential's proposed acquisition of AIA amid increased investor opposition to the deal.
Prudential has confirmed it is in discussions with AIG over altering the terms of its controversial £24.5bn proposed takeover of AIA.
Institutional shareholders owning up to 15% of Prudential are preparing to write to the chairman telling him they will oppose the insurer's $35bn takeover of AIA.
Prudential's efforts to persuade shareholders to back its $35.5bn takeover of AIA, the Asian business of AIG, have been dealt a blow after an influential voting adviser to investors told its clients to vote against the deal.
AIA's chief executive has told friends and industry executives he would quit if the UK's Prudential succeeded in its $35.5bn (£24.6bn) takeover of group's Asian arm.
The chief executive of M&G has decided not to buy his full allocation of shares in Prudential as part of its proposed takeover of Asian insurer AIA.
The US Treasury has secretly resurrected plans to float Asian insurer AIA on fears the £24bn sale to Prudential could fall apart.
Neptune's Robin Geffen has compared Prudential's proposed AIA takeover to the 2001 downfall of Marconi.
Prudential has revealed the terms of its £14.5bn cash call, with the issue price set at more than an 80% discount to the insurer's closing level on Friday.