Cheers gents,
I know I will never get a one size fits all kind of tyre but they seem close enough for someone of my standard. (and I'll still use the kit ones) I shall get some forthwith.
Had a blast today and found the car very easy to predict. May have just been the wetness of the track but found the car wanted to understeer into a turn when off power but when back on power it went into a very predictable and controllable powerslide

))
Lots of fun. Would fitting the one way lessen the initial understeer?