I love the look of your site - very striking!
Your IT friend has also set up your meta tags for search engines OK too - as the description and keywords meta tag are both present.
I doubt if they tested the syntax of the HTML of the site using the W3C online checker though, as it is coming up with 23 validation errors on the home page -
[Invalid] Markup Validation of http://www.cosmictan.co.uk/ - W3C Markup Validator - I'd have expected them to have been a bit fussier there, especially if they work in IT, as they have put an XHTML Strict DOCTYPE declaration at the start of the HTML code (sorry I am going off into very geeky stuff here, but it's the sort of thing that they should know about - it would help with browser compatibility and accessibility if the site conforms to the appropriate standards).
Also, all your images are missing "alt" text - this is bad from a search engine point of view (search engines can't "read" the content of images, so they need a text description of what's there - that is especially important if it's images with text in them like your logo at the top of each page and the navigation links), and from an accessibility point of view (blind/partially sighted/disabled/dyslexic people often use special software called screen readers to "speak" the text on web pages to them, and screen readers won't be able to do much with an image if there isn't any "alt" text there either). So I would ask your IT friend to add "alt" text to every image on your site too (incidentally the "alt" attribute is mandatory for XHTML too, so your site will continue to fail W3C validation until all the images have alt text added).
Another query I have relates to the "stock" images on your site. It's very important that you get permission for any images that you use from the copyright owner - and purchase a licence for any stock photos that you use, e.g. from istockphoto.com or wherever. Particularly, a couple of people on here received demands of hundreds of pounds from Corbis Images for use of "unlicensed" images on their sites with threats of court action under the Copyright, Designs & Patents Act if they did not pay. And there is an Israeli company called PicScout that works on behalf of companies like Corbis and Getty Images - they run software that trawls the Web looking for unlicensed images, and then notify the copyright owner (e.g. Getty or Corbis) if they find one of their images on a website - and then Getty or Corbis will likely seek damages if they find that the image has been used without a licence.
If you're really paranoid about that, then it may be worth asking if your web host can block a particular range of IP addresses on their firewall - see
PicScout, Getty Images and Goodbye iStockPhoto..! for more information - this should stop PicScout's bot from accessing your web site.
A lot of people don't know about the copyright issues I've described above, and will likely get a huge shock if they get a letter out of the blue (usually from Baker & McKenzie Solicitors in London if it's Corbis) demanding hundreds of pounds - and will often panic and pay up. But you're usually better off talking to a solicitor first before making contact - I've heard that Limeone are a good company to contact - and you'll likely pay them a lot less to sort the issue out than the amount demanded in the letter too!
Hope that helps - you've got a fab looking site with great content, and it will be even better once you get your friend to sort the accessibility issues out. :hug: