A production apparatus for use with a subsea wellhead has a tubing head spool and a vertical tree. The tubing head spool has an end suitable for connection to the wellhead. The tubing head spool has a production bore extending therethrough and a tubing hanger arranged therein. The vertical tree has a tree connector at a lower end thereof. The vertical tree has flowline extending therethrough. The tree connector is affixed to a tubing head mandrel of the tubing head spool. The flowline is in valved communication with the production bore of the tubing head spool. The flowline extends outwardly of a vertical tree so as to allow a flow of production fluids outwardly of the vertical tree. The tubing head spool is a horizontal Christmas tree with master flow line and the annulus line sealed closed.