I mean I can do the study for them right now.
Three countries use imperial measures. The USA (who don't actually use the same imperial measures as we do/used to), Myanmar and The Bahamas.
One of them won't give us a special trade deal, we've already asked more than once and we keep getting told no. Switching to imperial measures will not change this. Good luck on making the best of the opportunities with the other two.
Conclusion: Not worth doing, makes no sense, get on with your actual job please. Especially as more and more people can't afford to heat their homes or eat properly.
I'm a fair man and I appreciate times are tough, I'll accept £50,000 for this comprehensive piece of work which is very cheap compared to the £900,000 it cost to tell Boris Johnson "no, you cannot build a bridge between Northern Ireland and Scotland".