snow bumping
The situation is not so easy, as "you wont get bumped".
Different circumstances call for different responses.
In general: companies would prefer to bump, (assuming they can alert the bumbed in time), there is a heavy cost factor, involved with pax who are actually at the airport, compared to still at home. LCC have different desires in relation to these costs.
Also: snow closed is an "act of god", a delay due to a late incoming is not an "act of god", and thus can attract massive costs.
If you have not checks in, then most companies will have no contractual liability to you.
I am just so pleased that I am not in the UK, this week. I was there for the December snows, that was enough for me.
glf