Forecast models and charts fairly consistent on a gradual change to southerly winds, at least over the UK, overnight Friday/Saturday,
UKMO surface charts to T+120
Metbrief - Met Office Analysis and Synoptic Weather Forecast Charts via Wetterzentrale
300mb forecast charts to T+120 (rh side of page)
CRWS Jet Stream Forecast Map Menu
Here's hoping those lows approaching from the SW are more vigorous than forecast.