The sparring session was built up well by sensei TO and we investigated some key points of distance and timing and assessing how your sparring partner reacts to your movement. In addition I was prompted by MH to relax more (easy for him to say: he's bigger, stronger and more experienced!), but I don't think he meant for me to stop being more jittery. I took from this remark that in order to move in sparring with speed and deliver meaningful and strong attacks, this has to be done from a fluid and relaxed state (with obvious power at the end of the technique).
Point duly noted.
I wish we had worn sparring gloves though...ouch!