Heres a copy from The Ballroom Competition Figures 2.
Waltz.Back LF. Lady outside backing LOD. Then turn 3/8 of a turn to right, RF to the side to Chasse RLR to end facing (diag to centre) as the weight is taken on RF on step 10 continue to Pivot 1/2 to right and lower to end backing diag to wall on new LOD.
Same in the Foxtrot except that the lady is not out side on step one. And facing DC becomes DW.
I'll still stick to the Side Crosses

"Heres a copy from The Ballroom Competition Figures 2."

A copy of what?
That is clearly not a chasse to the left of any kind, and will not fit into the routine originally described.
I have seen that described as a tumble turn and wondered where it came from so thanks for the reference.
It is however totally different from the (foxtrot) tumble turn described in Geoffrey Hearn's book and demonstrated by the Hilton's on a tape of which I cannot recall the title at the moment.

As I mentioned in an earliier post it can be very confusing if there are two very different figures named "tumble turn". Maybe we should add natural and reverse to distinguish them.

The confusion come from quickstep having inserted a spurious outside partner step on the lady's left, man's right before the actual figure.

sorry, man's left, lady's right outside partner.

The actual figure begins with the man's step back on his right foot, lady's on her left.

I' ve got the Hilton' s doing a Chasse Roll in the Waltz and the Foxtrot. Waltz was the question.
The group is. Open Telemark. Curved Feather from Promenade. Chasse Roll to right. Natural Pivots. Natural Twist Turn to Lunge. heel pivot.
Commence diagnal to the centre. Chasse Roll to right at corner.
We have a Tumble Turn in the Foxtrot and Quickstep. Nothing in the Waltz. We also have a Rolling Chasse in the Waltz. Take a pick.
Anonymous.Enough of you using the words spurious remark. You just cant help it can you. The script which you have apparently have not got says
Chasse Roll to the right at a corner. MAN. LF back with lady outside backing LOD ( its the man backing LOD )
The Lady. RF forward outside partner facing LOD.
Try keeping your illegitimate remarks to yourself and stick to the subject at hand.

"Anonymous.Enough of you using the words spurious remark. You just cant help it can you. The script which you have apparently have not got says
Chasse Roll to the right at a corner. MAN. LF back with lady outside backing LOD ( its the man backing LOD )"

More like enough of your GROSS INCOMPETENENCE.

You confused everyone else by describing a sequence beginning with a spurious outside partner step, that is NOT A PART OF THE ROLLING CHASSE OR THE TUMBLE TURN. Instead, it is an artifact of whatever steps preceded the figure in question.

You will never ammount to anything as a dance educator until you can move beyond rehashing out of context trivia, and learn to actually EXPLAIN WHAT IS RELEVANT TO THE QUESTION AT HAND, without confusing them with random out of context babble.

A tumble turn or a rolling chasse starts with the backwards step of the man's right foot, lady on her left foot INLINE. Basically, just as a feather finish would commence.

The confusion is nothing to do with spurious extra steps.

Quickstep correctly described a chasse roll to the RIGHT but the original question was about a chasse roll to the LEFT.

The two figures start with the opposite feet, move and turn in the opposite direction, and typically start and end in different alignments.

For chasse roll the left/right gives a clue, that is why I suggested referring to natural/reverse tumble turns to make the direction of turn clear.

"The confusion is nothing to do with spurious extra steps.

Quickstep correctly described a chasse roll to the RIGHT but the original question was about a chasse roll to the LEFT. "

Oops - you are right!

It wasn't a spurious extra step, it was a spurious other figure!

I haven't yet found a Rolling Chasse to the left. Most people I know do as Marcus Hilton demonstrated. After a Running Weave which is
1 and 2. 3. Followed by Double Side Locks. which is 1 2 and 3 and. Left foot now free for Reverse Movement
In the demonstration instructions this is followed by a Reverse Fallaway.
If Dave could say what is to follow it might throw some light onto whether the correct name is being used or not.

"I haven't yet found a Rolling Chasse to the left."

Well it's pretty common. As has been pointed out several times here, what we are talking about is essentially a chasse replacement for a tumble turn.