I'm not sure how much populists differ from authoritarians, but for the latter "consolidating power" is the definition of success, all else is unimportant.

Getting control of immigration, which includes deporting them and massively overhauling the asylum system and seriously addressing and investigating the grooming gang scandal, which is probably the biggest scandal in recent history. I would actually now add a third thing which is to reign in the out of control police who are arresting people for causing offence. By the way these aren't even the biggest problems facing Britain, just serious ones which are recieving the most attention and for good reason, because they should be simple to fix and they are throwing away our sovreignty for terrible reasons.