The routing for the old ladies has been
London Gatwick – Keflavik – Goose Bay – Chicago/Rockford – Victorville
The three withdrawn so far have all gone that route.
According to Jethro's the next two to leave will be DOCE & DOCG in December. Those leased A320's must be coming soon!
Source
http://www.jethros.org.uk/fleets/fle...ng_b737srs.htm