Freelander 2.0 di thermostat

Hi people i have been a member for a while now and being thick couldnt figure out how to post on here i would like to know please where the thermostat is on my 2.0di engine i anm flushing the cooling system and putting new antifreeze in but would like to change the thermostat at the same time and perhaps the temperature sender any advice as to where these are would be great thanks in advance and sorry if this is in the wrong place