James Robinson wrote:

You can fly on airlines that have "Plus" or "Club" seats. These are
seats that are similar to business class, but have the same service as
economy. They are priced somewhat more than economy, but less than
business class. Airlines like British Airways and Virgin Atlantic have
these seats for the transatlantic portion.

Learn something new every day. While Virgin does indeed offer a wider seat in
their plus section, the British Air seat is only 18.5" wide - no different than
their regular coach seat. The BA plus seat appears to have footrests and some
other ammenities that might make it a bit more comfortable. Both offer more leg
room over a cattle class seat.