[openrailwaymap] Tagging proposed railways as electrified

Hello all again. I have a query about acceptable convention for tagging a proposed railway, i.e. one that is tagged railway=proposed If the electrification system that this new railway will adopt is known, it is normal/acceptable to add electrification tags? The obvious example here in the UK is HS2, which is going to be 25kV 50Hz AC overhead line as a matter of public record. Should we tag that as electrified=contact_line/voltage=25000/frequency=50?