Of course it’s entirely possible that the upcoming rationalisation of P&P could solve the issue.
Join on SH. One move to LH RHS.
Next move must be SH P1. Followed by one move to LH P1!
End!
That would save the frankly bizarre nonsense. Not to mention hugely expensive, situation of people flip flopping between the same seat on different fleets, as and when the whim takes them.
Some might say it’s an easy give? Common sense? Better than other cost saving options.