Interruptible Forward Flow

Interruptible Forward Flow (IFF) is transmission capacity from the Netherlands to the UK that is only available for booking when all Forward Flow capacity has been sold. IFF is not firm guaranteed and  may be interrupted when firm forward flow capacity is nominated.


  • Sold via auctions on the PRISMA platform
  • Non-guaranteed interruptible capacity
  • Only available when all Forward Flow capacity has been sold

The reserve prices for interruptible capacity products will have an ex-ante discount of 10% to the standard firm products conform NC TAR article 16. Since BBLC has no experience with selling interruptible capacity, it is not reasonable to estimate the probability of interruption based on historical flow data. Moreover, since BBLC is a merchant interconnector without baseload capacity, also expected flow data are not suitable to estimate the probability of interruption. BBLC expects a higher probability of interruption than 0% based on historical flow data. Therefore, the discount is set on 10%, until further notice.

Registered shippers can book Interruptible Forward Flow via the PRISMA platform. For further details please consult our Booking Procedure. BBL is happy to register new shippers. To ensure smooth and timely co-operation, interested parties should follow the procedure described on the Become a BBL shipper page.

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