Martin Lewis recently recommended not fixing. Wait to see what the new rates will be
No, that's not correct.
What he's said is that for many people, doing nothing may be the best thing - because a lot of suppliers' fixes are ridiculously high.
He also said that some are better and if you're being offered a fix at a 40% increase or lower than the current variable rate to consider it...because a 40% rise is likely going to be cheaper than what's coming in 2022. Its not just the projected 51% increase in April but then an additional 20% again potentially in October.
We fixed last week and I'm so glad we have. Our 12m Loyal Octopus fix offer for Electric was 30% higher than the current price cap. We jumped at it.
However - that fix is no longer available - the cheapest fix with Octopus already went up last week.
The pp who said they're waiting to see what the cap is before deciding - by then, you'll be too late. As soon as the variable cap is announced, it's likely that all the fixed rate offers will jump to higher than it anyway.
At the moment some are still lower than a 50% increase because its a bit of a gamble in case the price cap rise isn't as high as expected.
You'd be better off fixing now if you have an offer available for a 40% or lower rise, then cancelling it if the price cap rise is less - because after the cap announcement, that offer won't be available to you so the choice is gone.