After failing to get my IIDTool to work, I emailed GAP who suggested that I have a dodgy OBD2 socket.
They kindly referred me to their FAQ's on how to fix the female connectors if they had got a bit loose. Unfortunately it turns out that I have at least one broken connector.

I am aware that in the forum shop I can buy a new connector with a wire already crimped on. But I wonder if any one knows where I can get bare connectors that I can crimp onto the original wiring loom.

Thanks
David Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

Lots around if you search "obd2 terminal connectors." 2006 4.2 SC

Yes already done that, however I have found a couple of articles that claim the socket body is bespoke to Land Rover therefore the terminals may be bespoke that's why I ask for a link to connectors that are known to work. Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

Fair comment, but it looks like a fairly standard dlc to me. Can't see any reason a normal pin set wouldn't work.

https://www.ebay.co.uk/itm/2006-08-RANGE-R...SwcapewNfV 2006 4.2 SC

I just found in the Electronic Library that the standard is indeed J1962 so I have ordered a new socket kit.
The socket body is not the same so as you suggested I hope the pins will be ok. Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours