There has been a system failure at Blogger which stopped anyone trying to access their account for the last 24 hours or anyone attempting to leave a comment on any blog.
It seems everything has been fixed and sorry if you have not been able to access this blog.
I have just noticed that today is Friday the 13th!!
Update: Saturday 14th May. I am still having some problems with the blog and Blogger have posted that they are still sorting out the system.