L322 2004 4.4 petrol/lpg Range Rover coolant leak - help needed

Hi guys I have got a coolant leak on my 2004 Range Rover 4.4 petrol/lpg, it's coming from one of the pipes at the back of the engine. I found the leak by removing the cabin filter scuttle and viewing from above.

The problem is I don't have any idea what this part that is leaking is or how it connects up? Does anyone know what this part shown in the pictures is and how I go about replacing it? At the moment as soon as the engine gets warm the coolant starts dripping out of the bottom of this section.

I have attached photos showing the leaking part. Thanks in advance for any advice.

At the last picture, you can see the JHC000081. This small tube often leaks. I just replaced mine (19 years old.....)
With a running engine, twiggle the tube and you can see the coolant leaking.

I carry a spare

I see the problem.
Its an L322
Not had a leak on my 20 YO P38 yet.