Content writing for blog

I am looking for a talented writer to write a weekly blog of 700 or so words for my existing blog. The topic will be stories about brands and how they achieved something - (it's to inspire service brands so examples from consumer product brands would need to go further than just discussing the consumer brand). I'm envisaging a number of pieces around internal culture and how leaders inspire their teams to follow the brand. Other topics of interest would be news stories about trade mark or competition issues affecting a business, or fast growth brands that have been bought by a bigger brand (e.g. Whatsapp when it was purchased by Facebook). There may be other topics we'd agree around this theme. I'm looking for a talented writer who can come up with ideas about what to write, agree the topic, research it and then write up suitable weekly blog content. I'd want an assignment of all rights and waiver of moral rights as well - the content would be published by Admin rather than named author. If you have the right experience and skills then please attach some specimen articles to your proposal. As this is a UK blog I'd prefer to have UK based authors. I've set a budget for one piece of content as a trial.