Wigmore Soloists: Michael Collins, clarinet | Alexander Sitkovetsky, violin | So-Ock Kim, violin | Rachel Roberts, viola | Steffan Morris, cello WEBER Introduction, Thema and Variations    for Clarinet Quintet Op. 32 MOZART Clarinet Quintet in A major K. 581 BRAHMS Clarinet Quintet in B minor Op.115     The Wigmore Soloists are Wigmore Hall’s…