David Cameron Hums To Himself After Press Statement

The speaker outlines their plan to attend the House of Commons for the Prime Minister's questions, followed by a visit to the palace to offer their resignation. They anticipate a new Prime Minister will be in place by Wednesday evening. The speech concludes with expressions of gratitude and affirmation.

What is the speaker's expectation about the new Prime Minister?

When does the speaker expect the new Prime Minister to be in place?