In the Admin dashboard, click on the 'Global' button near the top. You see a list of your blogs. On the right is a red cross. Click the cross next to the blog you wish to delete.

I see the list but no red cross, it looks like the last column has been cut short. im using b2evo v 2.4.5. thanks for your help

Assume you're logged in as admin?

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logged in using my usual login, presumably not a separate login required? All i can see is create new blog not delete blog!!

if your usual login isn't "admin" ( + password ), then your user may be in a group that doesn't have permission to delete blogs

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