It was demonstrated well on the recent Guy Martin program when he was attempting the electric car record, it'll be on C4 catch up, if that helps.

It will get quite interesting when this happens in the middle lane of the M4 and they have to cover it in a fire blanket and leave it for two days grin2

2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev