Can't find my smart electricity meter - help!

Hi @zac-has-limited-knowledge , and welcome to this customer forum. Well you’ve got further than some if you’ve found your meter details. 
If you can post a few photos of the gas meter and inside the other meter box that might help someone to identify - please don’t include and personal info as this is a public forum. 
I wonder if you’ve seen your distribution board while searching? That’s the device with the row of switches for different circuits. The electricity meter is normally close by .. between that and the incoming supply (100A cut out).

Thanks @BPLightlog appreciate the reply. 
 

I’ve added the photos of the incoming supply and the gas meter. The incoming supply is in box on the outer wall, with no obvious other box nearby.
 

The gas meter is in the boiler cupboard next to the boiler. Again nothing else in that cupboard. 

I haven’t found the distribution board. 
 

I’ve had one thought, which is that our flat occupies the ground floor of a three story house and has an independent entrance. The other two flat flats above have a short shared corridor leading to the stairs, and whilst I don’t have access to that entrance it’s possible the meter(s)  for the whole house is/are in there. Worth a check. 
 

Any other suggestions appreciated 
 

Ok so that feed into the building looks like a 3 phase supply (not sure how many properties it supplies) but that access corridor you describe could indeed be the part. 
You really need to find the distribution board in case you need to isolate any circuits (or if anything trips) but also just double check that you have the correct meter reference (it’s printed on the meter) so that you’re paying for your own use and not any of the others. 
The only other though is in an ‘under the stairs’ cupboard, favoured by installers. 

Hmm…

I’m not happy about something here. Bear with me a second as I need to get some advice.

Back again, sorry for the wait.

It looks like there might be some damage to those cables @zac-has-limited-knowledge . It might be worth asking UKPN to have a look and see about getting a few repairs done.

If you think they’re in a dangerous state, feel free to call 105 and they’ll see what they can do.

I can’t see any damage @Blastoise186 . The blue single to 3 feed connections is simply the neutral in-comer being split to supply each phase out to building

You might be right, I just don’t think I’ve seen that before.

Either way, if memory serves I think OVO and UKPN are capable of tracing the meter. I know Western Power Distribution can as I’ve had them do it before (at no cost!) so it may be worth asking both and see what you get.

@BPLightlog @Blastoise186  thanks both. 

In the first instance I’ll have a go at asking our neighbours if there’s a meter in their shared corridor. The more I think about it the more I suspect that might be it. Still would be odd to install a meter (and distribution board!) in someone else’s property since the split between the three flats in the building goes way back (several decades), but I guess for smart meters it might make more sense. 
 

If not I’ll get in touch with OVO and then UKPN if they can help direct. 
 

I keep feeling I must have missed something obvious and will be left feeling pretty silly, but having looked everywhere accessible from our flat I can’t see where it could be located. 

It wouldn’t be the first time we’ve seen meters in weird places. One of OVO’s Smart Meter Engineers talks to us a lot and I’m pretty sure he’s seen tons of weird ones as well.

Just in case it helps at all @zac-has-limited-knowledge those 3 black cables on the bottom right of your picture going out of the electrical box are the feeds into the building. The meter (and distribution board) will be somewhere along those and of course before the individual supplies.