What can I use to manage the wires when replacing a looped ceiling rose light fixture with one that just has loose wires?
You can use a block connector (you can bridge it - on one side loop a a wire into each terminal to make it like one big connector)



or You can use a twist connector



I was searching for something like this. But an insulated version- i found something in china but the problem is it will never be approved to use that on internal circuits due to high risk of electrical shock. These are used inside distribution boards only - and can only be installed by qualified electricians.