In my view, an inadequate number of socket outlets is not contrary to any regulation and does not merit any code upon inspection. Provided that the installation does have a minimum of two double sockets in the kitchen and one double in each other room.

This rather paltry provision is AFAIK a requirement under some regulation to render a home fit for habitation. Not in the IET regs though, possibly building regulations ? 

In my view, an inadequate number of socket outlets is not contrary to any regulation and does not merit any code upon inspection. Provided that the installation does have a minimum of two double sockets in the kitchen and one double in each other room.

This rather paltry provision is AFAIK a requirement under some regulation to render a home fit for habitation. Not in the IET regs though, possibly building regulations ? 

I think you're right.

I forgot to add that the reason this came about was a local authority carrying out an inspection on behalf of the tenants (we carried out an EICR on behalf of the landlords) and insufficient numbers of sockets was recorded on the Hazard Awareness Notice. I guess I should try to justify why we never mentioned it on the EICR. 

There seems some definite crossover here between the local authority (probably looking at some building reg) and BS7671 (which doesn't seem to mention it all). I think it shold be clear (not helped by the OSG) that as testers we're looking for what is potentially dangerous or not to current regulations, rather than whether the home is fit for habitation. Afterall it's not like we'd know how many people are going to live there or what electrical equipment they're going to plug in.

I guess in our defence, even if we had recorded it as a C3 then the landlord would still have had no obligation to rectify it.