Looks like an insulted version of a Bemco unit. Just out of curiosity, how close are bare live parts to the holes? IIRC the requirement is IP4X or IPXXD - the latter is somewhat more lax - as long as a 100mm long 1mm dia wire can't touch live parts, it could well comply technically.

   - Andy.

The terminals i could see were a fair way down.  Do these sort of things generally have fuses in ? or do i have a load of unfused meter tails

Unless there is an obvious service head somewhere else - cant see on this one,

There will be a row of 100A fuses that belong to the DNO in the white box, probably a few per phase. Does it have anti tamper seals and how is your attitude for risk....

I may be tempted to go a little  wild with a mastic gun and split some universal grommets, assuming the holes are a standard size and 32mm.

https://www.tlc-direct.co.uk/Products/GR32B.html

and then get out and not ask too many questions.

M.

Cheers Mike.   I can't get access again now without going through the estate agent. I'll just put it in the report and leave it to them to sort out if it needs it.  Thank you all for your help.  

Gary

Cheers Mike.   I can't get access again now without going through the estate agent. I'll just put it in the report and leave it to them to sort out if it needs it.  Thank you all for your help.  

Gary