The couple in question are not (one hopes) enduring emotional trauma.
A Separation Agreement is all that's required here. Judicial Separation is not needed; and if Solicitors are being paid for their services, I fail to see how their time is being wasted.
In any event, with neither children nor property in question, the SA will be fairly straightforward.
This is a strategic Separation Agreement; not as unusual as you may think. If one party is, for example, in a long term hospital or care or prison this can be advised for legal and financial reasons.
I'm amused at the outrage being expressed.
If we accept two men getting married, solely to avoid inheritance tax; then we should equally accept couples separating to avoid financial handicaps.