There is absolutely no appetite to elect the hard left. The left of the Labour party is dead and it is unclear if its leader will even be a member of the party in the next election.

We did get a significant tax cut a few months ago (?), it wasn't a rate change but they removed the cap of how much of your pension is tax free.

Immigration is at record levels, I'm not sure what it would mean to open it up further.

I think the stuff you are hoping for will happen quite soon, especially with loosening of regulations around food (so we can e.g. import US meat)