Hello everyone ive just recently bought a 2.0 diesel estate and ive just noticed the temperature gauge stays quite low at low speed but goes to the middle of the gauge at motor way speeds???any ideas what is causing this???its my 1st jaguar.​​

 

puddly, what you are describing sounds like a stuck thermostat. It is actually stuck open. Replace the thermostat and then see what you have at that point.