Comprising the 74 parliamentary constituencies in the administrative area of Greater London. At the 1997 general election Labour won 57 seats, the Conservatives 11 and the Liberal Democrats 6.
There was a swing from the Conservatives to Labour in excess of 13% in London in 1997 which saw the party's parliamentary representation drop from 41 to just 11. That sort of result had already been foreshadowed in the 1994 European Parliament elections when Labour polled a majority of the votes cast, with the Conservatives managing fewer than 30%.
The Liberal Democrats won 6 seats in the capital in 1997 - up from just one at the previous general election - despite winning a lower share of the vote.
Previous patterns of national party support suggest that Labour and the Conservatives will win 9 of the 10 seats in London. On current evidence these would split 5-4 or even 6-3 in favour of Labour.
However, in the 1998 borough elections the Liberal Democrats polled 21% - enough to win 2 European Parliament seats.
It is possible that a minor party grouping will do sufficiently well to pass the effective 10% threshold and thereby win a seat.