Not sure about TG, but CO has a nifty feature that lets you specify a class of booking you would like to select, and an SFO-LHR search in BusinessFirst with COS specified to I yields a message that "! The class of service entered is not valid. Please enter the class in the format Y, H, K. See the help page for class of service for more information." And the following url
https://www.continental.com/web/en-US/c ... Class.aspx
suggests they no longer use the "I" booking code, though they might well have done so in the past when they were in SkyTeam. Weird ...
https://www.continental.com/web/en-US/c ... Class.aspx
suggests they no longer use the "I" booking code, though they might well have done so in the past when they were in SkyTeam. Weird ...