Like the spreadsheet said you should be OK for class 2 which is all you need for PPL. I went for a class 1 but with 2.25 astigmatism I was just over the limit of 2.00 on the initial appointment but then the limit increases to 3.00 dioptres on a renewal for the class 1!! You are unfit for class 1 and class 3 due to astigmatism > 2.00 but a "fit assessment may be considered following review by an ophthalmologist" from the caa website.
Not sure why they view astigmatism so badly, from my last eye test the lady said that 2 dioptres of spherical correction are worse than 2 dioptres of cylindrical correction. I'm sure there is a reason behind it.
There is a huge thread about vision requirements on PPRUNE
here