well, on the road at 5 this morning, or was it 4 . Haha, the clock said 5, so stuck the work destination in the sat nav and did a good scan of the radio channels and clock stood its ground. Looks like I'm going to have to bite the bullet and adjust this thing manually.  Declan
2003 FFRR Vogue 4.4 V8
97 Defender 90 300 TDi

My Peugeot Van does it automatically But then that bluetooth’s Music too...

And was produced in 2009 come on JLR

The clock in my 2016 L405 loses time slightly. My Porsche has the option to sync its clock with the GPS so is spot on. Why not on my L405?

...it's a luxury vehicle, ...you shouldn't care about time, somebody will care in place of you. .. 2016 RR ATB (Kaikoura Stone w/Brogue/Ivory-Brogue)

Yep, my 9 year old Merc managed to set it's self to summer time....as did most things in the house.
Apart from:
1820 Grandfather clock
1870 Wall clock
1997 Defender
2012 Full Fat

Refreshing that Land Rover are maintaining something of a tradition  2012MY Range Rover 4.4 TDV8 Vogue...now gone!
2007MY Mercedes C200 Estate 'Albert'
1997MY Defender 90 TDI 'Vera'

I had to do this yesterday as I've been away.

It is rather poor given that the technology is already in the car (the GPS).