I have no idea why there would be 2 black sockets. If you open the flaps & look at the pins inside - are the centre pins the same ?

Usually you should have a 12N & a 12S - 12N is the normal trailer connections & 12S is the supplementary caravan connections. AFAIK they are identical except for the centre pin - one has male, the other female.

There's loads of sites with the pin descriptions - example here and if you look at the pictures of a 12N & 12S plug you should see the difference in the centre pin.

Thanks Alistair - after checking the pins, I have the 12N and 12S plugs so have ordered the socket adapter for charging. Fingers crossed that works as looks a nice simple way to charge.

Will work fine mate. That’s what I use.

Means you can lock the car etc when charging without having to keep bonnet open etc.

Just need to remember to unplug it before you drive off 🤣

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport

Been there, done that - saw a long blue extension lead in my rear view mirror once when I had a RRC with a block heater in Canada...

My fix is to leave something on the driver's seat to remind you that the car is plugged in - the box / bag for the charger works well.  Bish.

2005 110 TD5 CSW
2011 TDV8 Vogue SE (gone)

I put a little steel bin so it blocks the drivers door, as I go in my garage with the front of the car facing me…..

 2011 Range Rover Vogue SE 4.4 TDV8

Previous cars :
2003 Range Rover Vogue TD6
1999 Discovery Td5 ES
1995 BMW M5 3.8 6 speed
1992 Range Rover 3.9 Efi Vogue
1992 BMW M5 3.8
1988 BMW 735i SE
1989 Ford Sierra XR4x4 2.9i
1981 Ford Fiesta Supersport