London, United Kingdom, uses the Europe/London timezone. During winter London is on GMT (Greenwich Mean Time, UTC+0). In summer it advances to BST (British Summer Time, UTC+1). The clocks change on the last Sunday of March (spring forward) and the last Sunday of October (fall back).
London (GMT) vs Singapore (SGT): -8 hours (-7h in BST). London vs New York (EST): +5 hours. London vs Los Angeles (PST): +8 hours. London vs Dubai (GST): -4 hours. London vs Sydney (AEDT): -11 hours.
The live clock at the top of this page shows the exact current time in London. London observes GMT in winter and BST in summer.
Yes. The UK observes British Summer Time (BST, UTC+1) from the last Sunday of March to the last Sunday of October. Outside this period, London runs on GMT (UTC+0).
GMT (Greenwich Mean Time) is UTC+0 and is used in winter. BST (British Summer Time) is UTC+1 and is used in summer. The timezone badge on the clock above always shows which one is currently active.