If I just register the .uk or the co.uk then the very next day someone will register the one I have not got with a view to sell it to me at a future date and will park it listing it for sale, the more successful my site becomes the more the value of the alternative name rises.
How does that benefit the business community or the UK webspace ?
If I am the one that regs the name you refer to, and I sell it to you (or anyone else) for a profit, that is a "benefit", to me - someone who forms part of the "business community" and "UK webspace".
Would you like to tell me what the name is in advance and I reg it and we agree on a fixed price to sell it to you down the track?