Never has a French invasion of these shores been quite so welcome. The two-day siege currently being staged in the Royal Albert Hall by Myung-Whun Chung and his Orchestra Philharmonique de Radio France opened last night with patriotic fervour in an all-French programme. Even Beethoven’s Triple Concerto began rolling its “R”s when cajoled into life by the dashing Capuçon brothers. While their strongly accented interpretation may not have been to everyone’s taste, as an exhalation after the meditative intensity of Messiaen and Dusapin it was perfectly judged.