It would never happen in the Commons

[T]he Whig magnate Lord Hartington, whose vigour was all the more impressive since he had raised somnolence to a political art, yawning during his maiden speech and later dreaming that he was addressing his peers, only to wake up and find that it was true.

-- Piers Brendon, The Decline and Fall of the British Empire: 1781-1997.

... This would seem to be Spencer Cavendish, who became the eighth Duke of Devonshire in 1891.