Very badly, unsurprisingly: Eurostar is one of the main sources of income for Getlink, the company running the tunnel, along with train shuttles for cars and trucks. Getlink is in trouble too, and is calling for support.

`Arm wrestling' to save the Eurostar  - Politico.eu

Getlink, the Paris-based company which owns the Channel Tunnel, is also calling for government support for Eurostar, touting the operator's green credentials to the British government and making comparisons with the aviation sector.

"In the long term, Eurostar is the transport of the future: fast, frequent, low carbon and with great potential to expand to other destinations. Their business and leisure passengers will be back as soon as conditions allow," said John Keefe, Getlink's director of public affairs.

If Eurostar goes under, it leaves a big hole in Getlink's finances, one that's unlikely to be filled by replacing passenger trains with cargo ones.

What I find surprising is that both Getlink and Eurostar are majority owned by French shareholders. You'd think that people living on an island would have at least a passing interest in the smooth and continuous operation of the only terrestrial link to the Continent, especially in times where empty supermarket shelves are a major concern for the British public.