Back to the thread:
Politics
As PM I would make a new ministry - the Ministry of Common Sense.
Education
I would make the teaching of a modern foreign language compulsory from grade 1 (ie age 4 or 5). Mandarin would be good, but it would depend on teacher availability. Urdu, German, French, Spanish, Russian.....would all be fine. This is because being bilingual or multilingual improves brain function, makes a person think in wider ways, and of course increases inter-cultural understanding. You never just learn a language - you learn the language and culture together. This would make the whole country brainier in a generation, and destroy residual racism.
( No good saying that it is more important to learn English skills - learning another language improves skills in English and gives an understanding of how language works.)
Health
I would make whatever laws necessary to protect the NHS and keep it well funded, and include dental care.
Housing
I would make it compulsory for councils to build more council houses, and to use the rent to maintain them and build more still. I would fund homeless shelters, and reopen mental hospitals for those street people with psyche problems, because many of them would be in this category.
Children
I would increase child protection systems, and introduce checks and balances to ensure resources are used correctly.
Transport
Fund and improve public transport. Encourage canal use.
This would all have to be funded. I'd increase taxes for the rich, but not so much that they all bugger off to tax havens. I would tax junk food in order to raise funds and improve health. I would introduce a state lottery to help fund the health system. True, there are problem gamblers but they gamble anyway. I would increase the tax on petrol and diesel to encourage people into public transport which is better for the environment. I would encourage towns and villages to copy 'Incredible Edible Todmorden' thus reducing food miles and food imports.
And then, when I'd achieved all this I would provide triple strength umbrellas for everyone, to protect from the fall-out from flying pigs.