Congratulations on getting your blog in a national newspaper, and hence bring a lot more readers along (like me). Newspapers seem to be picking up more and more from blogs and chucking it in the paper, cutting out the bits they don't like so that it fits what they want to say. If you *really* want to pursue it (and, as someone who used to be a magazine editor, i reckon it's probably more hassle than it's worth), then you have two choices: you can hunt through the website or give them a call to find out who to send invoices payable to, and send them an invoice for £75, which is probably as much as you would get if they'd commissioned you to write this; or you can speak to the legal people at your union who might be able to provide guidance or assistance. If you send them an invoice, just send it as though you'd been commissioned... the editor might just sign it off because it's easier than arguing. make sure you put your full name, address, email and phone number, the title of the blog, the date and section of publication and title of publication (ie, Independent on Sunday, not just Independent). Good luck :). I'd be surprised if you get them to change their policy as another comment suggests, though - it's still a cheap and easy way of filling space, it's popular with readers, and a lot of blogs make it hard to find contact details for the writer - journalists aren't always tech-savvy.