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Hi all new here and wondering if you have seen heard of this situation/problem?

I wanted to remove surface mount sockets from the living room wall to decorate. In my old house I would just flick the mcb off for the downstairs ring and then made sure the sockets were dead before proceeding. However in our new house I done the same and flicked the downstairs mcb off only to find that the sockets were still showing 240v, I went back to the consumer unit to check that I had switched off the the correct mcb for downstairs which I had. Out of curiosity I switched the upstairs ring mcb off as well and found that the all sockets were dead upstairs and downstairs. same happens if I turn upstairs off and leave downstairs on both rings are still live. Any thoughts please as it just don't seem right.
Many thanks
 
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