To be honest - for the UK aviation isn't the important issue. If we don't subsidise the cross-channel freight/ferry capability they will collapse in a wee or so and then the country will starve within 4 weeks. Roughly 50% of our food comes across the channel by ferry, so we need to sustain that. Aviation can safely left to die so it can emerge again from the ashes in 6-12 months time. It's not that important strategically, and it was going to fall apart due to brexit anyway - this just brought that collapse forward by a few months.
PDR