The following link will take you to a Road Safety video that explains what you should do if you are driving and you hear or see an emergency vehicle and blue flashing lights / sirens
It is quite informative and only takes a few minutes
This video is an instructional video driving through Hornchurch (Romford to Rainham) on Blues and 2’s
https://www.youtube.com/watch?v=82HjSq9YFyY