Given that most of the UK seems to enter the ballot you'll need a bit of good fortune! Your best bet is to try and run the good for age qualifying time between now and August. Your target is sub 3.05.
Summer is for fells so doubt I'll be doing that. It's Pie in the sky and I'm thinking about Manchester anyway.
Fast half marathon will get you in the championship, I think you are fast enough
Sub-75 feels a long way off now - that pace is quicker than my 10km pbs (5 years old though they may be).
Might see what presents itself in july-early sepetember.