To make it easier for members of the Institution worldwide to access material for CPD purposes, the Institution has recently begun recording the lectures which take place at the London HQ. The webinars are available as live broadcasts or as a recording which can be watched at your convenience.
This increasing collection of free webinars is available here.
Additionally, the International Association for Bridge and Structural Engineering (IABSE) has an ever-growing database of lectures, covering a wide range of topics related to structural engineering. These lectures can be freely accessed here.