Intervention workover control systems

A method of providing an intervention workover control system for an underwater well, the method comprising:

• providing an apparatus comprising:
• a first structure comprising an umbilical termination unit and a connector configured to connect the first structure to a hydraulic flying lead;
• at least one support configured to support the hydraulic flying lead, wherein the at least one support comprises a first support for use with the first structure, wherein the first support supports the hydraulic flying lead;
• at least one support configured to support at least one electrical flying lead;
• a second structure connected to a first side of the first structure;
• a third structure connected to a second side, opposite to the first side, of the first structure;
• and
• wherein the first structure, the second structure, and the third structure are modular parts configured to provide for at least two configurations of the intervention workover control system, wherein:
• in a first configuration, the first structure is usable with the second structure and the third structure connected to one of the first side and the second side of the first structure, and
• in a second configuration, the first structure is usable without connecting the second structure and the third structure to the first structure;
• and
• using the apparatus to form the intervention workover control system according to the first configuration or the second configuration.