An almanac of statistics and historical comparisons relating to the Norwich North by-election

The full result is on the site here, but below are some statistics and historical comparisons relating to the Norwich north by-election:

1. Chloe Smith has won the seat from Labour with a majority of 7,348 with 13,591 votes and a 39.5 per cent vote share.
2. Labour came second with a 18.2 per cent share and 6,243 votes.
3. Labour lost 70 per cent of their vote from the 2005 general election.
4. The swing from Labour to the Conservatives was 16.5 per cent, nearly as high as the swing at the Crewe & Nantwich by-election (17.6 per cent).
5. This is more than twice as big as the swing from Labour to the Conservatives in the 1978 Ilford North by-election (7 per cent), which preceded the Conservatives 1979 general election victory.
6. It is of the same scale as the swing from the Conservatives to Labour in the 1997 Wirral South by-election (17 per cent), which preceded Labour's 1997 landslide general election victory.
7. Since 1950, when the seat was created, Norwich North has had a Labour MP for 45 of the last 59 years, holding in difficult years such as 1959, 1970 and even 1979. (It was held by the Conservatives between 1983 and 1997).
8. The turnout of 45 per cent is higher than the average turnout in the 36 by-elections held since 1997 (42.1 per cent) and better than 23 of those by-elections, including Sedgefield, Ipswich, Bromley & Chislehurst, Leicester South and Brent East.
9. This is only the second time the Conservatives have won a by-election from Labour in 27 years (the others being Crewe & Nantwich in 2008 and Mitcham & Morden in 1982).
10. Last year, Conservatives won Crewe & Nantwich from Labour on a 17.6 per cent swing.
11. The last Labour gain from the Conservative before their 1997 general election victory was in Wirral South (1997). Labour won the seat on a 17 per cent swing (and won the subsequent general election on a 10 per cent swing).
12. The last Conservative gain from Labour at a by-election before their 1979 general election victory was in Ilford North (1978). Conservatives won the seat on a 7 per cent swing (and won the subsequent general election on 5.5 per cent swing).
13. If the swing of 16.49 per cent attained at Norwich North were replicated at the general election , the following cabinet ministers would lose their seats: Jim Murphy, Alistair Darling, Ben Bradshaw, Jack Straw, John Denham, Ed Balls, Ed Miliband and Douglas Alexander.