Dear London Underground, dear First Great Western, dear South West Trains, dear C2C, dear National Express East Anglia, dear BAA, dear Southeastern, dear Transport for London, dear First Capital Connect, dear Network Rail, dear London Overground, dear Southern, dear London Midland.
It's snowing. Because it's winter. It is not unprecedented. That's what happens in winter. It has happened last year. And the year before. And it will most likely happen again next year.
Deal with it. Because that's what you're getting paid for.