Boris Johnson speech cutaways and slow motion shots

The transcript discusses the One Nation government's overwhelming mandate from the election to deliver Brexit and the trust placed in them by the people. It addresses both supporters and non-supporters, emphasizing the need to focus on priorities like the NHS, better schools, and safer streets. The speaker calls for unity across the UK and aims to make 2020 a year of progress, urging everyone to enjoy their Christmas preparations with confidence in the government's efforts.

What does the speaker mean by 'unite and level up'?

What message does the speaker want to convey regarding Christmas preparations?