Thank you for your help. Luckily I saved some of the code from the old approach, which was working well.
Can I ask you one more question - since StartCutscene is such an easy way to disable all input and take the kind of control needed for the turn-based combat, is there a way to block any escaping the cutscene with the key as at present? I think I can get it all working if I wrap the combat sequence in a Start/End Cutscene. This was semi-working now but the user could escape out with the key.