A combination of a drilling installation for drilling a well and a control and signal lines deployment module is disclosed. The drilling installation includes a rig floor slip device adapted to be cleared from a well centre opening to create a clear space around the well centre opening. The combination includes a temporary workspace floor, adapted to be mounted in the clear space at a level below a rig floor surface and to provide a workspace floor for an operator standing in said clear space on the work space floor, allowing the operator to secure at a securing level said one or more control/and or signal lines externally to a second tubulars string suspended from a module slip device.