By Ali Lyon Rachel Reeves is set to promise a Budget that will “rebuild Britain” in a speech at the Labour Party Conference that will claim that the “work of change has only just begun”. In a notably more optimistic tone than Labour has adopted in recent weeks, the Chancellor will vow to deliver a “Britain of opportunity, fairness and enterprise” through a Budget of “real ambition”. Speaking on stage in Liverpool, Reeves is also expected to reaffirm her commitment to prioritise growth and make the UK an attractive place to invest, after several leading City figures voiced concern about the moo…