By Reuters Staff (Adds dropped word ‘to’ in the headline) (Reuters) - British transport operator FirstGroup Plc is selling two North American-based bus units to funds managed by EQT Infrastructure for about $4.6 billion, Sky News reported on Thursday. The deal, which Sky said would be announced on Friday, citing sources, exceeds earlier price expectations and will return millions of pounds to FirstGroup shareholders. Aberdeen-headquartered FirstGroup and EQT both declined to comment. FirstGroup announced a year ago it had begun the sale process for the FirstStudent and FirstTransit busine...