That is horrendus and dangerous (if the connections are not making properly there is a risk of fire).
At the very least you need a thorough inspection and test.
Its not the worst of it - the house is undergoing a complete rewire at the minute and I keep finding this kind of quality workmanship... thankfully its all going.
Im in the middle of trying to get the service head and supply cable moved - now theres another story!
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