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Yep, I think I've seen a handful of people do this in the years I've been riding round here. Depending on whim my commute either goes all the way along embankment from Fulham or joins here at Chelsea Bridge.
The design is pretty crap. If you're confident enough to get in the right hand lane as you come over the bridge, there is a nice big ASL and space to wait in the middle of lanes.
If you're less confident, you can keep to the inside and wait where you suggested. The big issue with this is it means less confident people have to be careful not to be left hooked getting to that safe spot. The road is often chock full of buses and lorries, and that left cycle lane leads you right into left hook territory.
Scrabble
Redbush
That right is iffy and I don't like it. The junction has one of those two stage right turns for the bike lane doesn't it? ie. Stay left and join the embankment in front of the waiting traffic coming across you and go on their green. You also then get every hero blast past you for taking the pole position they sprinted so hard for. It's a bit cycle infrastructure 100% all in but less death defying.