To be absolutely fair, it often seems that in the UK you'd be better off disguising your startup idea as a work of performance art and making an application to the Arts Council for a grant.
For an added bonus, you wouldn't have to give any of it back at the end, and if you can show that you did anything that was in the slightest bit similar to your original proposal and didn't just drink the money, then they are mightily impressed and offer you more free cash.
[edit] Just thought of the "Dada Tech Startup Incubator";
We dress startup founders in octopus costumes and teach them about semiotic forms and stuff, in order to get given money from the kind of well-heeled philanthropists who spend more on things like opera than they are willing to lend to small businesses.
We charge a compelling rate of 4% equity and a broken window full of the lost dreams of a hungry sparrow.