OM Gruppen, the Swedish group that has launched a £820m (€m1.4bn) hostile takeover bid for the London Stock Exchange, wants the UK Takeover Panel to intervene over the LSE's decision to hold an extraordinary general meeting.

At the meeting, scheduled for October 19, LSE shareholders will vote on whether to lift a rule, put in place when the exchange demutualised, which limits shareholders to owning no more than 4.9%.