Exactly.
It seems quite convoluted - certainly not thought out.
Budget Paper 1, Page 26:
The government is intending to introduce a road user charge for plug-in electric and zero emission vehicles. The charge will include a fixed component (similar to current registration charging) and a variable charge based on distance travelled. Electric vehicles do not attract fuel excise and therefore make a lower contribution to the cost of maintaining our road network. The proposed road user charge will ensure road maintenance funding is sustainable into the future.
I wonder if that includes or excludes PHEVs?
If it excludes PHEVs, you could buy one and run mostly on Electric power and fly under the radar.
If it includes PHEVs, do you pay Electric Tax on the kilometres for the year AND fuel excise on every litre of fuel you pump into it? Or do you have to keep a log book on your electric miles vs petrol miles?