Well what is the actual problem? Are you not able to load the page or can you not access them due to login issues? I have not seen any downtime on the site from here, but I know google has got some major changes going on(google caffeine), however this should only effect there search end of business not the blogger site.
Its look like problem with my ISP whenever I go to blogspot.com or blogger.com it shows the error message like this Network Timeout The server at www.blogger.com is taking too long to respond. I'm trying to contact the ISP Admin
I also live in the UK and it is working for me. It might be your Internet provider. I myself was blocked from DP for months and I actually thought it was down until I used a proxy and I could access DP. Use a Proxy. See if that works.
OK Guys, Its solved now.. The problem was in my local internet provider, They accidentally blocked any traffic to www.blogspot.com and www.blogger.com Thank you for all of your confirmation
No my blogspot.com blog are working fine even today I also make new blog that also fine may be there is some problem with your internet connecting some time some site get black listed due to some problem so you need to contact your internet service provider to tell them the problem so they will resolve the issue