A fourth was deployed when it was realised it was a high-rise block of flats.

Police were searching the high-rise block last night.

The company placed a television mast on a recently constructed high-rise block nearby and relayed the received terrestrial signal by cable to many local homes.

The same panels were found on about 30,000 other high-rise blocks, of which 20,000 are still awaiting remediation work.

With lifts often broken, she spent much time climbing up and down flights of stairs in high-rise blocks.