Lord Mayor Mairtin O Muilleoir made a surprise appearance in Belfast on Sunday to introduce the Ulster Orchestra, conducted by Spanish guest Jaime Martin, in the Ulster Hall.
The concert had the imaginative title of Composers Fighting Back.
Britten's iconic Young Person's Guide to the Orchestra was played yesterday with all the precision and understanding required by the popular work.
Copland's jazzy Clarinet Concerto was also heard to full effect, with a solo performance by the orchestra's principal clarinettist, Francesco Paolo Scola.
The Ulster Orchestra gave a blazing performance of the fourth movement of Tchaikovsky's Fourth Symphony, the beauty of the third movement even more memorable than the ever-popular Finale.
The first two pieces will be performed again today during the lunch-time concert at 1.05pm in the Ulster Hall.