P294 – Addition of Offshore Transmission System and OTSUA to the definition of the Total System

Formal title: Addition of Offshore Transmission System and OTSUA to the definition of the Total System

Current Status

Initial Written Assessment
Assessment Procedure
Report Phase
With Authority
Awaiting Implementation


P294 amended the definition of ‘Offshore Transmission System’, ‘Total System’ and ‘System’ to include Offshore Transmission System User Assets (OTSUA). The changes:

  • address any confusion between definitions in the BSC and Grid Code and align with the requirements in the DCUSA.;
  • remove the requirement to install Code of Practice 1 (CoP1) compliant metering at the onshore Boundary Point between the Transmission System and the OTSUA (the cables connecting the generator to the onshore Transmission System), Settlement metering that becomes redundant on transfer of the OTSUA to an Offshore Transmission Owner (OFTO); and
  • ensure consistent treatment of transmission losses along the OTSUA, which would, under P294 be socialised in the same manner as the Transmission Company extending the onshore Transmission System or an OFTO extending an Offshore Transmission System.

P294 amended the definitions in BSC Section X Annex X-1 to deliver the outcome set out above.


P294 was raised by E.ON UK on 3 June 2013. The BSC Panel considered the P294 Initial Written Assessment at its meeting on 13 June 2013, and agreed to submit it to a three month Assessment Procedure, during which P294 underwent the Workgroup’s Assessment Consultation. The Workgroup recommended that P294 should be approved, and its Assessment Report was presented to the Panel at its meeting on 12 September 2013.

The Panel initially recommended that P294 should be approved and issued P294 for its Report Phase Consultation. The Panel made its final recommendation that P294 should be approved at its meeting on 14 November 2013. P294 was approved by the Authority on 19 December 2013 and implemented on 30 December 2013, 5 Working Days following its decision.

Next Events

There are no further Workgroup meetings scheduled.


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