The likely thing a stranger may notice on first meeting 58-year-old Jeffrey Donaldson is the aftershave. He is dapper. A sharp dresser who routinely smells of cologne. Not Brut. He could mix in most company with little risk of causing offence. He has impeccable manners. Committed as he is to the Union, you would never find him on the terraces, noisily booing throughout the rendition of his rivals’ national anthem Although new to the ranks, he was the first DUP member authorised to travel across the border to the MacGill Summer School in Co Donegal during the party’s slow dance…