Great advice from everyone. Which really makes sense if you are used to hacking/more experienced. When I was learning I found this really tricky to ride.
It's disconcerting for them and you when they want to go faster because it's what they are used to and you are saying no.
They are not being naughty- they are doing what they've essentially been taught.
As a learner your every instinct screams hold tighter on the reins, tense up and stop them. The absolute bugger is that your instinct is wrong.
This is one great instance of where in riding our instincts can be wrong.
For most horses, taking a firmer hold of their mouths (contact - it's more complicated than this but I'm keeping it simple) means going up a pace. And if you are tense and tipping forward, that's also the aid to "go".
So you need to do the opposite.
Breathe. Really slow and deep. Think about breathing down into your bum. You are trying to make it heavier. You want to have your reins short enough that you can feel their month but not tight and bracing against them - and then gently squeeze and release the reins.
You are saying I'm here, and I say stay at this pace.
It takes quite a lot of confidence to do this. Which is not much help when you are learning! But once you try it you'll realise it is more effective than getting into a pulling match.
The most important thing is to think about making your body heavy while sitting up at the same time - with a relaxed hand.
And turning a circle is fine - indeed a very sensible thing to do.
Think breathe deep and full and relax relax. Much easier said than done I know.
Dos that make sense? I can try to explain it differently.
What did the two instructors on the hack say?
In there defence there may only be a few hacking routes they can use so they have no choice but to take you where the horses normally go faster.
It's a vital skill to learn have as you progress to riding other horses at all paces. How to make sure it's you dictating the pace, whatever else is going on. And you are never going to achieve that by hanging on grimly for dear life.
If someone could have a word with my mare who often disregards all my lovely sensitive riding... that would be great.