UK: Boris Johnson visits construction work being done to Hereford Hospital to launch a new NHS funding scheme.

The video discusses various topics, starting with time management during summer, followed by the integration of sprinkler systems. It then moves on to creative ideas and observations, and concludes with a discussion on sprayed plaster and a government switch.

What does the speaker mean by 'sprayed plaster'?

What is the significance of the phrase 'Government switch' in the context?