The Ulster Orchestra's free BBC invitation concert at the Ulster Hall next Friday is rich in cross-connections. Tchaikovsky's 19th-century view of the 18th century (in his Suite No 4, Mozartiana) and Respighi's 20th-century view of the 19th (in his ballet Rossiniana) top and tail an evening which has at its heart two organ concertos, one by Haydn, the other by Marco Enrico Bossi. Performances of Haydn's organ concertos are rare and the performance of a concerto by an Italian composer famous for his organ music is rarer still. New Zealander Gillian Weir is the soloist and the conductor is Swiss Matthias Bamert, courted as principal conductor by both the Ulster Orchestra and the NSO.