Coolant has to go somewhere.

pressure test for longer.

if you suspect head gasket, do a leak down test. Test each cylinder for a minimum of 10 minutes.

 

I’m having same problem but with a 2014 lr2 I would have a small puddle after driving the car no leaks park it no leaks then 20 min later a small puddle behind the passenger wheel so I removed the plastic in wheel wellgot vehicle to operating temp shut it off twenty min later crawled underneath the car to find a black box with the name fomo.co on it pa6 gf 30 Land Rover says it’s a drain pipe well it’s so tucked underneath the resorvour don’t know how to pull it off one and two the flap on the end of it flips open is this normal and if I replace this 15 dollar part is this gonna stop the leak ?? Seems odd to me but and suggestions I would appreciate it

 

Sorry, I try to stay away from LR2s.