Leader of the Opposition

Wikipedia:Verifiability Opposition (parliamentary) Leader of the Opposition (South Africa)
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The Leader of the Opposition is a title traditionally held by the leader of the largest party not in government in a Westminster System of parliamentary government. The Leader of the Opposition is seen as the alternative Prime Minister, Premier or Chief Minister to the incumbent and heads a rival alternative government known as the Shadow Cabinet or Opposition Front Bench.

In many Commonwealth realms the full title is Leader of Her Majesty's Loyal opposition.

Specific instances

See also