ZKEOJ From New Zealand, joined Feb 2005, 924 posts, RR: 7 Reply 1, posted (3 years 1 month 3 weeks 3 days 7 hours ago) and read 1696 times:
BA has two versions ("Note that British Airways flies more than one version of the 777. There are three classes on this transatlantic plane, but BA also has a 4-class configuration."), and one does indeed have row 18. But it is not WTPlus, just regular Y: