 Just as in 1866, when the north transept burnt down, the building was not adequately insured to cover the cost of rebuilding (at least two million pounds).The South Tower and much of the lower level of the Palace had been used for tests by television pioneer John Logie Baird for his mechanical television experiments, and much of his work was destroyed in the fire.Baird himself is reported to have suspected the fire was a deliberate act of sabotage against his work on developing television, but the true cause remains unknown.