battery gave up the ghost so got a new one, put jump leads from her car on to the clamps old one out new one in everything as is no need for eka code etc
although it never really suffered from hot start prob it would take a good 4-5 seconds of cranking before it would start when hot
now it starts instantly on the turn of the key since the new battery was fitted

Low cranking speed is a common cause of diesel starting problems.