What if the new elected upper house worked similarly to the Australian Senate? Our House of Representatives is the same as your House of Commons (except that it uses IRV instead of the undemocratic FPTP) with single-winner districts. But the Senate uses a proportional system (STV) electing 6 Senators per state for twice the amount of time an MP is elected for. So they’re relatively less concerned about the day-to-day shifting polls than MPs are, and you get a result that’s much more representative of what the people actually want.
In the UK context, it might be easier to sell PR in an entirely new house than it would be to update how the Commons is elected.
Isn’t it just a small amount of data? If the picture is small enough you could put it directly on the blockchain.
Dunno why you would though. It’s very limiting for no particular gain.