This a joke? BBC have spent lots of our licence money making an hour long program telling us stuff we already know. 
everything they were sayings has been said of forums like this for many years though.
they got the adding extra drivers to insurance bit wrong too, some times adding drivers makes it cheaper
WAtching the mpg bit, disconnect air con what saves battery, i thought it was belt driven
Trickle charge your battery before every trip to stop the alternator from increasing ancillary drag.