Google isn't showing that phrase as anything Starmer said, and I haven't found it in Hansard. Of course Google might not have indexed it yet, so can you give a link to where he said it? The exact phrasing of the original is important. For example, if he said Johnson needs to put forward a plan for the way ahead that we can all have confidence in, it would have a very different meaning. So if possible, a link to the full text where he said it, rather than a journalist's interpretation.