Data centers across Europe and the UK are expanding faster than utility grids can keep up. This session introduces a customer‑driven Bring‑Your‑Own‑Power (BYOP) strategy that provides resilient capacity through investment‑light open‑cycle generation designed specifically for FLEX‑connection schemes and ancillary‑service participation for cloud and AI loads. Operators can meet demand quickly while reducing exposure to grid delays. When grid constraints persist over longer periods, the same architecture can be enhanced into a high‑efficiency combined‑cycle system, with optional absorption chilling to reduce cooling loads and improve PUE. With dual‑fuel resilience, H₂‑readiness, and a future‑proof upgrade path, this approach empowers operators to accelerate development, secure predictable performance, and enhance sustainability without major reinvestment.