Hi Tony, Assuming it's the same as the Freelander KV6 one which I fitted earlier this week for an intermittant non start, it's a 1.8 K series sensor with a link lead to convert from the newer small pins direct on sensor to the larger 3 pin in the loom.
The lead is available from Land rover if Rover don't do it. Sensor I fitted was: NSC000310L Lead was YMQ503270, each was approx £25+v retail.