AECB (Association for Environment Conscious Building) is a network of individuals & companies with a common aim of promoting sustainable building. The AECB runs free webinars to share specialist knowledge. Although every AECB webinar is completely free for all to attend, the webinar recordings are usually only for AECB members. However, they have made them accessible to all during lockdown.
Past webinars have included:
You can view them here: https://www.aecb.net/webinar-recordings/