via https://mobile.twitter.com/RosamundUrwin/status/1171874438620602375 


15. Facing EU tariffs makes petrol exports to the EU uncompetitive. 
Industry had plans to mitigate the impact on refinery margins and 
profitability but UK Government policy to set petrol import tariffs 
at 0% inadvertently undermines these plans.

This leads to significant financial losses and announcement of two 
refinery closures (and transition to import terminals) and direct 
job losses (about 2000). 

Resulting strike action at refineries would lead to disruptions to fuel 
availability for 1-2 weeks in the regions directly supplied by the refineries.