XJL Intermittent Starting Problem

[Mitchell G]

Hi, My 2015 XJL has developed an intermittent problem of on occasions it will not turnover and start. This appears to be linked with opening and closing the boot as the non-starting can occur after I have placed something in the boot and sometimes can start after opening and shutting the boot.  Recently the engine stopped when in traffic I pulled into the side of the road to allow oncoming traffic through…..the ECO stop start stopped the engine and it refused to restart. I opened the boot using the switch on the dash, got out of the car and closed the boot, got back into the car and it started. The battery is new and has been coded into the car. I have had the boot latch and starting motor replaced and the problem exists. Earthing appears to be OK. My local Jaguar dealer can not find the issue and neither can local auto electricians ?  I am at my wits end !!!  Have any of you guys come across this issue and advise me how it was resolved.