The activist hedge fund calling for Barclays takeover target ABN Amro to consider all suitors has accused the Dutch bank of being "disingenuous" after it agreed to meet a rival consortium but only after a key deadline for its shareholders has lapsed.

The Children's Investment Fund Management this morning reacted to ABN Amro's twin moves last night to extend talks with Barclays and agree to meet rival suitors including Royal Bank of Scotland early next week.