Don’t believe it for a second, there isn’t any real weather “havoc” wreaking in London airports. What they got is a little bit of snow and ice in -2C weather - not “subzero” temperatures. Their being a major airport hub combined with their ineptitude in mildly inconvenient winter conditions is causing delays throughout europe. It’s laughable in light of real harsh conditions in airports like Denver or maybe even New York.
Our flight to Sweden is later tonight. Hopefully the airports and airlines get their act together by then.