Punchy, zingy, raspy, and rushed. By far the most erratic concert of the summer season was delivered at last night's Prom where Paavo Jarvi brought his small band of Bremen town musicians (that is, the well-regarded Deutsche Kammer-Philharmonie Bremen). When Haydn made his second celebrated visit to London in 1794, he employed an orchestra of up to eighty musicians playing before crowds of perhaps a thousand. So it's pure affectation to ask forty musicians to play two of Beethoven's most powerful works, the Violin Concerto and Symphony no. 5, in the yawning spaces of Albert Hall, which seats over six thousand. In the name of period style we were treated last night to three double basses, all but unheard beyond the first few rows. They might as well have sawed the air.