HSBC and Barclays on Tuesday highlighted the divergence between successful UK commercial banks and struggling part-nationalised ones, as the country’’s two biggest banks reported robust Q3 results. HSBC published no detailed figures but said Q3 pre-tax profits would be “significantly ahead” of last year. Barclays reported pretax profits of £1.6bn, little changed from Q2, and resumed dividend payments after nearly a year. The results contrast with last week’s poor Q3 figures from 70%-state-owned RBS and Lloyds Banking Group, 43% state-owned.