Paul

Freezing energy it at the current level looks a little unrealistic.

Perhaps aim for middle ground, say £2500, a 25% rise is a lot better than 80%.

Also, rather than just cut taxes (as in the % rate) why not just raise the 'free' allowances.
The current 'Personal Allowance' is £12,570 - if you increased it to say £17,570 then anyone on minimum wage (£8.91/hr) would not pay tax.
That would be worth just over £80 a month to people, and be easy to implement.

You could also raise the rate for very high earners (50K plus) to help pay for it.
I realise this all sounds very labour like, but there has to be some kind of plan in place.