Thanks everyone for the replies. I have a bit of trouble with consistency in anything. I am dyslexic, so left-right, up-down, this first-then that are always going to be a challenge for me but Mo is really smart and so the communication is improving. Sheena, I didn't even realise, but I do put Mo into heal position (without thinking) when I walk past a distraction, so that's good. When Mo is really focused and pulling me and I can't turn him, I ask him to sit (he never and more importantly, I never, forget sit) but even though he is sitting I can't let go of the tension or he will bolt, so if I am caught of guard and he has the full length of the lead, I have to sort of wind him in like a fish. At the very least, I must be providing some sort of entertainment down the local park.
Newfie, I am also using a martingale, I am going to research "touch". Beloz, I also going to look at LAT. Both of these are new to me. Hyacinth, thanks for reminding me not to reward without first getting the desired result (big weakness of mine)
Thanks again everybody.