The Passivehouse website says:
Primary Energy Demand
not to exceed 120kWh annually for all domestic applications (heating, cooling, hot water and domestic electricity) per square meter of usable living space.

the draft SAP EPC says:

Posted By: Dominic CooneyThe Passivehouse website says:
Primary Energy Demand
not to exceed 120kWh annually for all domestic applications (heating, cooling, hot water and domestic electricity) per square meter of usable living space.

Which Passivehouse website is that?

According to https://passivehouse.com/ (the PHI website) and specifically https://passivehouse.com/02_informations/02_passive-house-requirements/02_passive-house-requirements.htm "The Renewable Renewable Primary Energy Demand (PER, according to PHI method), the total energy to be used for all domestic applications (heating, hot water and domestic electricity) must not exceed 60 kWh per square meter of treated floor area per year for Passive House Classic."

There's also some discussion of standards at https://passipedia.org/basics/energy_and_ecology/primary_energy_quantifying_sustainability

PH originates from German standards, which differ from SAP / BRE methodology so any resemblance between the numbers would be pretty much coincidental.

But anyway, well done on your EPC result :)

Dunno why they're using old criteria (replaced in 2015). The link above the table goes to the authoritative page and that links to a comprehensive PDF if you or anybody else is interested.

Nice! SAP 2012 (used for EPCs) uses rather out-of-date figures, including a primary energy factor of 3.02 for electricity. IE it assumes that each 1 kWh of electricity that you buy, will take 3.02 kWh of primary energy to make, in line with the low thermal efficiency of the power stations back then.

The updated figure in forthcoming SAP 10.2 is 1.50, half as much, reflecting the reduction in coal power stations and increase in wind/solar electricity, which are assigned a much better primary energy efficiency.

If in future your EPC is redone with SAP 10, the primary energy demand reported on the certificate should get even better than you already have!

Likewise the carbon emissions of the energy used in the building should get even better, in line with the national reduction in carbon intensity.

I don't know how PH handles all this sorry. I understand there are differences with SAP how they handle electricity imports vs electricity generated on site, and building energy consumption vs heatpump electricity consumption.