The Met Office has issued multiple yellow weather warnings across the UK, forecasting heavy rain, thundery downpours, and potential travel disruptions. Rain is expected to affect major events like Wimbledon and the British Grand Prix, with downpours predicted between 10am and 6pm. The weather disruptions have already caused chaos in London, including the closure of Golders Green tube station due to flooding. Temperatures are set to remain below average, with highs around 17-19C. The unsettled weather is expected to continue into next week, affecting various parts of England, Wales, and Scotland.