A small but well-connected bird tells me that the history of the expected Mk1 includes BoB kills. If the deal goes through the BBMF will have an aircraft as good, both technically and historically as the Vacher's Mk1. The only issue is that it will take three years to get into the air.
Given that there were four Hurricanes flying during the BoB to each Spitfire, it makes sense to me to have a Hurricane that is truly connected to the battle, not one that rolled off the production line several years later.