I'd say that was cheaper than even before prices started edging up around July, so it looks like you're on a 1 year fixed. Unfortunately I didn't understand the arcane Octopus moving feast which was my 1 yr fxd expiry reminder in late July (for 1st Oct. maturity) so didn't fix until a month or so later, when the 24 month fix had already gone up by over £100 a year (est. based upon my previous usage)
Electrical units are easy; what you read on your meter is the kW you've used. Gas is bloody awkward as it's still charged in therms (or is the kWh?) but the meter reads the other measure. Of course there's a formula but it's disconcerting to see many more (x2+?) 'units' charged for than your meter reads.
I do NOW believe, as I wasn't convinced before, the my 2 year fix will pay dividends; it's still lower than the cap, however that is administered, but I'm probably a fairly low user anyway.
The thing which annoys me is that the standing charges have, to my mind, no relevance at all to the energy costs, yet they go up with every increase. It's a big con, just like the telephone st. charge,
as without the infrastructure, they couldn't sell you their products !!!!!!