Misc: What do you call the person who institutes a suit in a court?

Questions

What element is lacking in a diet causes goitre?

What elton john record label did kiki dee join in 1973?

What English china company has a lion as it's logo?

What english city was known to the romans as venta bulgarum?

What english writer said 'give me a decent bottle of poison and i'll construct the perfect crime'|agatha christie?