Simon Keynes and the numismatist Mark Blackburn initially suggested that in about 875, Alfred was the sole recognised ruler in London, while Ceolwulf's involvement would have come about only towards the end of his reign, 879.
Simon Keynes e o numismático Mark Blackburn inicialmente suxeriron que en aproximadamente 875, Alfred era o único gobernante recoñecido en Londres, mentres que a implicación de Ceolwulf se produciu a finais do seu reinado, 879.