This was posted a couple of weeks ago and someone posted a fab link explaining it, but now can't find it again. Explanations would be much appreciated thanks.
I was taught the bridged way in one hand for my BHS stages and that's the way I have always done it, always exercised the hunters ride and lead this way.
From holding reins normally, turn both hands so thumbs are next to each other (like you're a magician saying guess which hand). Move one hand in front of the other and pass both reins into one hand. You end up with one rein going in through the little/ring finger gap and out through the thumb/pointer the other rein is vice versa. You can then turn the hand to assist with steering.
Some people put a finger/thumb between the reins but I find this complicates things - though it is necessary with a double bridle, which I will not even attempt to describe without pictures!!
That sounds easier than I've been finding the way on that other website is (currently one handed after a run in with a horse at work). Will try and master both methods, imagine it can only be useful for future exams etc.