The London session in the global forex market is one of the most important and active trading sessions. It typically starts at 8:00 AM GMT (Greenwich Mean Time) and ends at 4:00 PM GMT. However, it's important to note that during daylight saving time (DST), the UK moves to British Summer Time (BST), which is GMT+1, and the London session starts and ends accordingly. So, during DST, the London session starts at 8:00 AM BST and ends at 4:00 PM BST.

The London session is renowned for its high trading volume and liquidity, making it a favored time for forex traders and investors. It overlaps with both the Asian session and the New York session for a few hours, leading to increased market activity and potentially favorable trading conditions. This overlap is particularly significant as it often witnesses strong price movements, providing ample opportunities for traders to capitalize on market fluctuations.

Traders looking to participate in the London session should be aware of economic news releases and events that can impact currency prices. These events can create significant volatility in the market, presenting both opportunities and risks. Overall, the London session is a pivotal period in the global forex market, and understanding its timings and dynamics is crucial for successful trading.