Yesterday and today I've noticed when pulling up at work that the cooling fans are running what sounds like full speed and continue after I've locked up for a short while. Is there a reason for them being on apart from the obvious?
Coolant is spot on, checked this morning cold. No fault codes and the needle sits where it always has.

I thought it might be just the higher ambient temps we've had but I'm currently on nights and it wasn't particularly hot this morning when I drove home but the fans were on when I parked. I've only got a 6 mile commute sat at 40 - 60moh 95% of the journey so the engine isn't exactly being exerted.

Is it anything to worry about?

UPDATE
Engine Management Light came on this morning on my way home. P0116-17 ECT sensor.

Also noticed the temp gauge dropping back down to 0 when coasting downhill.

Plugged the IIDtool and today and monitored it a few times and the sensor appears to fault above 50 degrees. The fans are on before the cars even upto running temp. Current
2013 Range Rover Autobiography SDV8
2001 Porsche 911 Turbo
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2007 Range Rover Vogue SE TDV8
2002 Range Rover HSE TD6
+ Many other non LR products