Sorry, I now realise I wasn't very clear there, I always use the Brewer's Friend priming calculator; I was more wondering if I should pitch some fresh yeast. At least my new stir plate isn't wired through the fridge so I could set it up to grow up some fresh yeast for priming and brewing my next beer (the stirplate and flask don't fit when there's a FV in the fridge).
Alternatively, I think I have a 2nd sachet of CML sparkling wine yeast which I used to help carbonate my sours, that should be safe enough to use.