I know this has been answered, but I'd say the replies are confusing.
Given the original post stated there was 1 mm cable in insulation and asked if that was okay. Dave showed the calc for both 5A fuse and 6A MCB. Assuming the load is okay for the cpd, the cable is okay.
Tafyo then confirmed he has a 6A breaker. If he decides to add loads of chandaliers and ends up with a 10A brekaer, the cable will not comply THEN. We are not expected to design with a crystal ball.
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