In this video, Allen & Overy (A&O) senior partner David Morley talks to Legal Week editor Georgina Stanley about how A&O has changed in his 35 years at the firm, the firm's progress in the US and the challenges facing all UK firms in the States, and the likelihood of mergers between the world's largest law firms.

For more, see 'We can't pretend we're as credible in the US as we'd like' – A&O's Morley on his hopes for the firm