Labour Promote Political Sabotage

Now that it's blindingly obvious that the UK Labour Party is going to lose the General Election later this week, they've resorted to abusing the voting system in order to prevent their long term rivals, the Conservatives, from winning a complete victory. In areas where the Liberal Democrats are a larger threat to the Tories than Labour themselves, the advice is to vote Lib Dem in order to prevent them gaining the seat.

Does anyone else think that the system is broken?