Gollum gifted a ring to his civil partner Frodo (Chpt 11 CGT Individuals Part 2)

In the youtube video lecture Chapter 11 CGT Individual (part 2) Example 7 lecturer says that there is no gain on sale of the ring. But in TX Notes it says that Capital Gain = 8000

I think that lecturer is probably accurate.
But however Notes are misleading at this point.