Are you suggesting that if my building is very unlikely to catch fire I can reduce protective measures below minimum standards for life safety?
I believe you can only reduce standards having regard to fire development not likelihood, and that of course takes into account use of premises.
I'm not entirely sure what "minimum standards" are; I will make the assumption that this refers to British Standards or regulatory guidance (e.g. the ADB)...
My view: the answer to your question is "Yes, if justified by a risk assessment".
It all boils down to the following:
'Traditional' approach to fire safety: assume that a life-threatening fire may occur, and provide management or engineering mitigations to deal with it;
'Risk assessment' approach: reduce fire risk ALARP, by prevention if possible, and if it is highly improbable that you will have a life-threatening fire, you need to little to mitigate that small risk - you 'assume' that you won't have a life-threatening fire.
Yes, the fire may happen tomorrow; but it probably won't! There is a small (but real) likelihood that I will get shot on the way to work tomorrow, but I've chosen not to wear a ballistic vest - because I probably won't!
Of course, we will have one day have a fatal fire in a premises assessed along these lines, maybe where standards significantly less than those in the relevant BS / ENs were followed. This does not necessarily make that risk assessment invalid and may not (in my view) constitute an offence.
This issue is one that the enforcers will need to get their heads around. Simply saying you don't comply with guidance is no longer a valid position to take.