It's an amazing site not just for being 'clean' and functional, but also for how much effort they've put into actually making the information easy to understand and read. E.g consider the page on VAT rates (that's roughly like sales tax for the Americans here):

https://www.gov.uk/vat-rates

(for comparison, click through to the HMRC list of VAT rates - fairy enough, it has more information, but it's so messy in comparison)