Will a Scotland 'love bomb' woo voters?

Boris Johnson and Nicola Sturgeon seem to be battling for the position of most amiable leader. The First Minister invited Johnson to meet with her on his visit to Scotland, but the PM politely declined, instead inviting Sturgeon to a more formal meeting of devolved administrations. The Prime Minister's visit to Scotland is part of a wider plan to soften support for independence. Will a 'love bomb' work? Katy Balls speaks to James Forysth and James Johnson, co-founder of polling firm JL Partners and former pollster at No. 10.