Take That star bought £17.5m mansion in London 's Holland Park in 2013 . Now he wants to build extension with large subterranean swimming pool . Plans upset some neighbours - chief among them veteran guitarist John Betjeman . 71-year-old said it could upset the fabric of his Grade I listed tower house . He hired architects and engineers who warned of 'damaging ' vibrations .
Take That star bought £17.5m mansion in London 's Holland Park in 2013 . Now he wants to build extension with large subterranean swimming pool . Plans upset some neighbours - chief among them veteran guitarist Page . 71-year-old said it could upset the fabric of his Grade I listed tower house . He hired architects and engineers who warned of 'damaging ' vibrations .