You can not do curbside check-in for the London flight. They pre-screen all checked bags at a machine situated at the western end of the first class/buy tickets counter. I don't know if there is a separate line for elites/first class.

Curb side check-in has resumed for domestic flights out of Lambert. The security point at the B concourse has been closed, everyone must go through at the C/D concourse security checkpoint. There is a rat's maze and sometimes a line extending through the terminal, but it moves fairly quickly.