Just to add to that, when I took this pic....
There was about an inch of snow over ice. I tried to reverse out of the drive. I had nothing in the back. With difflock on, I ended up with wheels on both axles spinning and I was going nowhere. I was actually a little embarrassed to get me landy stuck in an inch of snow. I had to turn it round so I was driving forwards up the slope and it flew out like it was on tarmac. Weight distribution is critical.

There was about an inch of snow over ice. I tried to reverse out of the drive. I had nothing in the back. With difflock on, I ended up with wheels on both axles spinning and I was going nowhere. I was actually a little embarrassed to get me landy stuck in an inch of snow. I had to turn it round so I was driving forwards up the slope and it flew out like it was on tarmac. Weight distribution is critical.