When Sir Michael Tippett first worked with the BBC Singers in 1944, the experience was such that he recalled nearly 50 years later that "It was to be the first of many such occasions when a composer's dreams were brought to fulfillment." Tippett's relationship with the BBC Singers went back to almost the beginning of his career, and he often expressed intense admiration for them. His faith is rewarded here. Now under the Conductor Laureate, Stephen Cleobury, the present-day BBC Singers return the compliment with this program of his works for choir, both unaccompanied and with organ. The plaintive high solo of the Nunc Dimittis, floating above strange middle-range harmonies, soars worlds away from cosy Anglican convention. The 'sprung' rhythms of Dance Clarion Air and The Windhover have a muscular freedom unlike anything in contemporary English music. The strangely irregular figures Tipett waves around the tune in Over the Sea to Skye may seem over-ingenious at first, but by the end their quite hypnotic, at the same time challenging the ear to re-examine a very familiar melody.