Allen & Overy (A&O) is leading on the first big London IPO this year, advising Dubai-based payment solutions company Network International, which is preparing to float on the main market for an anticipated value of £2.3 billion.

The company has brought in a raft of advisers as it prepares its listing, with A&O acting as the main legal adviser on English and U.S. law aspects of the float, while Dubai firm Al Tamimi & Co – among the Middle East’s largest law firms – is advising on UAE law, and KPMG is acting as auditor.