JAGUAR XJR - Smoke Signals

Q
I have owned my 2000 model XJR for eight years, it has a full service history including replacement water pump and timing chains. The car drives fine with no problems or codes, but on driving back from Greece this summer, when I arrived at Dover and started the car I noticed just for a few seconds some white smoke coming out the exhaust. This also happened the next day on starting the car. Is there anything to worry about? The water and oil are clean and at the correct levels.

A
Pure white smoke almost always indicates brake fluid; it may be that you have a fluid leak at the back of the master cylinder, which is then collecting in the vacuum booster and consequently being drawn into the engine on start up.