Lucky you. It'll still help though.

I wasn't kidding about using my coolant heater 3/4 seasons.

I also put mine on a remote control, so I could activate it ~an hour before using the car (I don't commute, so not on a "timer friendly schedule"). Mine is 800 watts though, and an hour is plenty for my little 1.0L engine. I suspect the Micra's isn't as powerful if it's the frost plug style.