Turns out I'm actually on 20p from a fix from last year, I was just grabbing some representative numbers off the website. Also this discussion has reminded me to put in a meter reading.
> my electricity has been free to negative all day
Like a gambler who only talks about their wins, people on these smart energy plans on the few days it goes very cheap only seem to pipe up with the current low unit price, and never mention their longer-term moving-average unit price...