Main CutOut Fuse vs Consumer Unit Rating

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Smarty91

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Hi, not sure if this is the right section as not quite DIY but had the DNO out today to replace the main fuse cut out (the old one had a fused neutral!) they put a 80amp fuse in it before sealing it back up.

I’ve got a new consumer unit to go in which has a 100a DP switch (which I think all consumer units do now?). Am I right in thinking that the consumer unit will be ok as consumer units need to be rated equal or higher than the cut out fuse?
 

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