A SERVICE of Remembrance to mark the centenary of the day Great Britain entered the Great War is being held on Monday, August 4 at 11am at the Tavistock War Memorial. Organised by the Tavistock branch of the Royal British Legion, the day will, in particular, pay respect to those brave souls from the Tavistock area whose names are listed on the war memorial. Everyone, and especially all former service charities and organisations, is invited to attend and participate in the important anniversary. • On August 4, 1914, Britain declared war on Germany. Sir Edward Grey, Britain's foreign secretary said the 'lamps are going out all over Europe; we shall not see them lit again in our lifetime'. The war, which became known as the Great War and the First World War, lasted more than four years, resulting in 888,246 British and Empire fatalities. The Royal British Legion and the cultural programme '14-18 NOW', has launched the 'Lights Out' campaign. At 11pm on August 4 Westminster Abbey will be shrouded in darkness — its only source of light will be the flame of a single candle at the grave of the Unknown Warrior. The Royal British Legion is inviting the public to host an event in memory of all those who died in the Great War by supporting the campaign. Lights will be turned off between 10pm and 11pm across the country. The Royal British Legion is hoping the event will mark the largest act of reflection the United Kingdom has seen. Special 'Lights Out' candles are on sale at Marks and Spencer stores at £4 — £1.33 of which goes to the Legion's Poppy Appeal.