"And ALL information of a public organization is "public" information"
In the USA maybe, but not in the UK. Ever heard of Crown Copyright? Also, in some cases, publicly owned organisations can compete with each other (and with the private sector) for contracts, and the information they hold is "commercial in confidence" just as it would be in any other setting. And then there's a further distinction between state-owned and state-funded.
Oh, and by the way, "organisation" is spelt with an "s" on .co.uk websites :)