Deletion of M13 motorway (2nd nomination)

Comment: If we wanted to |preserve the content, a merge with A13 road (England) is a possibility, since the M13 proposal followed the same route as well as sharing a number.  It could also be combined with coverage of the planned Maplin Airport, but that only has a section in Thames Estuary Airport, so it would unbalance that article
Stance: comment
Cited policy: Wikipedia:Editing policy (WP:PRESERVE)