"Region" field has disappeared from the checkout address form (UK) - all UK sites?!

[LBatLH]

Hi

I've just had an enquiry from a concerned customer that they weren't able to enter the UK county into the shipping address form. 

I have checked other UK based Shopify sites and they also have the same issue.

Based on our first time sales history, this occured on or around the 12th of November at checkout. I'm also pretty certain I could add it when manually creating customers last week.

The 'Region' field ('county' in the UK) is an expected field for UK based customers.

How do I get it back? Looking at previous Shopify staff statements, this is not user configurable? Please help!

Thanks

Thanks

Andrew