well since the police nicked somone for going through a red light to make way for an ambulance the 999 people now advise not to do it
as for roundabouts people usually pull up onto teh kerb or embankment if possible to make way
my advice is dont have a heart attack between 3pm and 6pm or your pretty much buggered
as for vibrating sirens i think my ex has one that runs on batteries because i occasionaly used to get in from work and hear buzzing and woooo woooo woooo coming from upstairs
