Scroll Along time line and click timeline for more information
| 1902 | -1902 | Reredos enlarged, designed by Walter Tapper | ||
| 1905 | -1910 | Welbore McCarthy D.D., Vicar | ||
| 1906 | Organ rebuilt by Norman & Beard. Oak case designed by water Tapper | |||
| 1910 | -1917 | Wm Isaac Carr Smith, Vicar | ||
| 1916 | -1916 | Insurance against damage by enemy aircraft cost £54 for £60,000 cover | ||
| 1917 | -1928 | Bernard Walter Hancock, Vicar More info | ||
| 1920 | Glaister Window by Kempe More info | |||
| 1922 | The four bottom niches on the West Front were filled with statues More info | |||
| 1928 | -1933 | Algernon Augustus Markham M.A., Vicar | ||
| 1931 | Hutchinson window by Kempe & Co More info | |||
| 1933 | -1939 | Geoffrey Hodgson Ward M.A., Vicar | ||
| 1939 | -1958 | Charles Harold Leeke M.A., Vicar | ||
| 1941 | The Bishop of Lincoln attended the funerals of the first air raid victims in Grantham | |||
| 1946 | The bells were taken down and recast | |||
| 1946 | The top 40ft of the spire was removed and rebuilt | 
| 1901 | Grantham's Population was over 17,000 | |||
| 1906 | A rail crash just outside Grantham station killed 14, injured 17. | |||
| 1907 | St Anne's Church New Somerby rebuilt | |||
| 1915 | Edith Smith became Britain's first official policewoman with powers of arrest More info | |||
| 1915 | Machine Gun Corps founded in Grantham | |||
| 1916 | Grantham's first purpose-built cinema, the Picture House on St Peter's Hill | |||
| 1922 | 49% of the working population was unemployed | |||
| 1922 | Severe flooding when the River Witham and the Mowbeck burst their banks | |||
| 1925 | Margaret Hilda Roberts, later Margaret Thatcher, born at North Parade, Grantham | |||
| 1926 | Purpose-built Library & Museum built on St Peter's Hill | |||
| 1929 | Baptist Church on Wharf Rd rebuilt | |||
| 1930 | Size of Grantham increased by 1,000 hectares More info | |||
| 1931 | The population was 19,630, slightly lower than in 1911 | |||
| 1939 | -1945 | 386 alerts, almost 3,000 properties destroyed and nearly 100 people killed in Grantham during WWII More info | ||
| 1941 | -1942 | Headquarters of No 5 Group Bomber Command in Grantham | 
| 1900 | Foundation of the British Labour Party | |||
| 1903 | First flight by Wright brothers | |||
| 1904 | -1914 | Suffragette activity, to gain votes for women, at its height in England | ||
| 1904 | -1914 | Panama Canal constructed successfully | ||
| 1906 | -1909 | Social reforms, including unemployment exchanges, free school meals and pensions for over 70's. | ||
| 1908 | -1927 | Model T Ford Car | ||
| 1914 | -1918 | First World War | ||
| 1929 | Collapse of New York Stock Market, beginning of world economic depression | |||
| 1939 | -1945 | Second World War | ||
| 1946 | First meeting of the United Nations General Assembly | |||
| 1948 | Gandhi assassinated in New Delhi | 
| Edward VII | Crowned | 1901 | Died | 1910 | 1904 Entente Cordiale | Saxe-Coburg Gotha | 
| George V | Crowned | 1910 | Died | 1936 | 1914-1918 World War I | Windsor | 
| Edward VIII | Crowned | 1936 | Died | 1936 | 1936 Abdication of Edward VIII | Windsor | 
| George VI | Crowned | 1936 | Died | 1952 | 1939-1945 World War II | Windsor |