Buildings That Go Bang, part two

On Saturday morning, an official explained that following the almighty bang heard by a capacity audience in the new Britten Studio during the discussion on Friday evening following a screening of Patience(After Sebald), a thorough examination of the building had been undertaken overnight. Experts had concluded that the reason for the bang was the rapid expansion (or was it contraction?) of steel components in the roof , because the building had been unused for some time before the capacity audience arrived on Friday evening, heating the hall up inside very rapidly while temperatures plummeted outside to minus -3. No damage had been caused to the building, only to the audience's nerves. Next time, the hall will be warmed up farther in advance.