different electoral systems

Question 1

first past post ?

Answer 1

-Where the candidate with the largest number of votes is elected

Question 2

marginal seats ?

Answer 2

seats heal by the small majority

Question 3

safe seats ?

Answer 3

-constituencies which have a secure majority

Question 4

what happened in 2009?

Answer 4

-a number of MP’s stood down rather than face the electorate.