Leo is a technical director at Mott MacDonald. He is a chartered engineer and member of the Institution of Asset Management, with 30 years’ experience supporting infrastructure owners in the transport, utilities and energy sectors with the management of their tunnels and other civil engineering assets. He was the main author of CIRIA's guidance document 'Tunnels: Inspection, Assessment and Maintenance', published in 2009, and is just putting the finishing touches to its successor, CIRIA 822 'Tunnel Asset Management - principles and practice' which brings it up to date and is due to be published before the end of the year. That new guidance, and the topic of tunnel management in general, is the subject of his presentation today.