Slow-burn UK-EU re-engagement under Starmer reframes the post-Brexit growth drag (Bloomberg Economics: -2.5% GDP) as a reversible structural cost, with polls now majority pro-rejoin. Mechanism: gradual restoration of EU goods-trade access (Europe ~50% of UK trade) is a long-horizon GBP-positive direction-of-travel. Bears on 6B (structural, no near-term trigger); secondary read-through to EUR/GBP cross.