Yes Mike, I have and it worked well. This summer I fished 3 days (nights) on the Ribble and fished 10 mm boilies over a bed of stewed wheat @ pearl barley and pellets. Both of us had a dozen barbel to 8lbs 6 on this as well as several chub each.
I have also used this combo for river carp and bream . You can have confidence in it. I actually flavoured the mix with curry powder and added garlic puree to it for some real honk. I'd be interested in your (and anyone else's) results.