I wonder if  it's one of these Lucy units - https://www.lucyelectric.com/product/10-way-msdb-horizontal-busbar/

   - Andy.

if it is one of those, then the inside looks  like this. The silver bits are tinned copper, not steel ;-)

For what they cost the N-E bus routing for customer tails is not all that straightforward. Photo shows it set for TNC but the link between the two brass bars at the top can be removed to make it TNS, and then that almost encourages the exit tails not to be sensibly paired, as there is one fuse under each hole, but all the neutrals are in the bar on one side and all the CPCs in the other.

Often wondered why one phase gets an extra outbound fuse, but hey ho.

Note the rubber deformable strip at the to provide sealing of outbound cables.

It could be worse - it could be half a dozen sets of henley blocks hanging in the breeze.

M.

Often wondered why one phase gets an extra outbound fuse but hey ho.

I wondered that too - most such units seem to have a number of ways that are a multiple of 3. Maybe the thought is 9 flats + 1 landlord's supply for a few corridor/stair lights and the occasional vacuum cleaner - so negligible extra load.

The internal fuse units look rather similar to one we usually see stand-alone or in the top of a cut-out (https://www.wt-henley.com/pdf/14688_series_7_house_service_cut_outs_2.pdf) in which case there might be reasonable protection from access to live parts if the sheath of the tails is taken into the terminal recess - as is the case with normal cutouts with upward facing terminals. (Well, if we adopt the DNO fashion of not regarding N as a live part.)

   - Andy.

Often wondered why one phase gets an extra outbound fuse but hey ho.

I wondered that too - most such units seem to have a number of ways that are a multiple of 3. Maybe the thought is 9 flats + 1 landlord's supply for a few corridor/stair lights and the occasional vacuum cleaner - so negligible extra load.

The internal fuse units look rather similar to one we usually see stand-alone or in the top of a cut-out (https://www.wt-henley.com/pdf/14688_series_7_house_service_cut_outs_2.pdf) in which case there might be reasonable protection from access to live parts if the sheath of the tails is taken into the terminal recess - as is the case with normal cutouts with upward facing terminals. (Well, if we adopt the DNO fashion of not regarding N as a live part.)

   - Andy.