Hi, I would say it is the green bit in the pie chart on page 1, and the explanation may be in the first paragraph on page 3, in essence you are on a low user tariff but have also signed up to paying variable charges due to energy market forces. It really could be clearer though. I think that various rates have applied to the 353 kw used during the period which is why they don't show detail, but in my view they could and should do so.
Try comparing with the rates you were paying for a comparable period in, say, 2020, before the change.
Must go and check my own bill now.
Michael.