UnScramble this Word: e u m n a r?

Questions

Give the title of the play by Yasmina Reza about three friends, one of whom buys a white painting on a white background?

Where was the first by-election for the Scottish Parliament held?

Who replaced Alun Michael as the Labour Leader in the Welsh Assembly?

Still running at St. Martin's Theatre, who wrote the play 'The Mousetrap'?

Which cricketer is known as the 'Rawalpindi Express'?