It's easy to connect your consumer unit to an isolation device with this Busbar 10 Module. You simply plug the electronic component into the bottom of your circuit board and secure it in place. This saves you the expense of replacing the entire board when you need to reconfigure electrical...
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None of the local screwfix had the BG one I linked to before.
The large square end wouldn't fit in the newlec rcd so I used a run of the smaller pins. The Newlec rcd didn't seem to let the pins go in as deep as the Hager mcb's so I trimmed the top of the pin into the rcd so the busbar could sit level and fully inserted into each terminal.
It's all working, all tight, a bit tidier. Took a look with my thermal camera and no untoward heat anywhere so I think all good.