"only circumstances" is a correct and usable phrase in written English.
You can use it when you are referring to a limited set of circumstances, usually limiting the scope of another statement. For example: "We will provide a refund under only certain circumstances."
"I would say Bloomberg would have a powerful defense, and the only circumstances they would not is if they knew what they were publishing was false," he said.
The only circumstances in which that would not be possible would be if the rights of British citizens living in other EU member states were not guaranteed".
This is one of the few (perhaps only) circumstances where that 1970s staple, diced mixed veg, still has an obvious use.
Asked by Lambert if those were the only circumstances in which Duckenfield would allow the kick-off to be delayed, Marshall replied: "No.
Only circumstances, and the corruption he sees all around him, make him a crazed killer who turns his victims into succulent meat pies.
Similarly, the only circumstances permitting a husband to interrupt a spouse's enjoyment of gritty Scandinavian crime drama is if the game should go to penalties.
That was not the only circumstance in which he was drunk.
So it is only circumstance that keeps the President from claiming the power to kill Americans in their homes?
"After 1921, being at the helm of a sailboat was really the only circumstance in which FDR's disability was irrelevant".
About the only circumstance in which incumbency isn't a big advantage is when the country is in dire economic straits.
The only circumstance in which we would recommend someone on benefits be put on an IVA is if they have assets, for example equity in their home.
