That although you've probably bookmarked or clicked a link to 'www.chertsey130.blogspot.com', you are now in fact reading 'www.chertsey130.blogspot.co.uk'. Unless you are in the States of course, in which case you still get the .com version. Or in any other country, where you will have got the relevant nationally-specific suffix. And if you use Blogger, the same thing will have happened to your blog. A different (though the same) version for every country in the world.
I must admit I hadn't noticed, until Diamond Geezer pointed it out. He explains why they've done it here. (And how to get round it if you need to)
It probably won't make any practical difference to any of us boaty bloggers, although it seems it will clog up search engines other than Google, who own Blogger of course.
It does get you thinking about the unsettling aspects of the web, and of depending on Google for so much, but there's no point complaining or wringing our hands about it. You can have your own domain under your own control if you're prepared to pay for it, but if not - as one of dg's commenters puts it - you just have to remember that if you're not paying for the product, then you are the product.