article_snippet: Engineers involved in a £200million 4G upgrading project in the capital found nests on a church, hospital and office block in the last few days.
article_snippet: Phone masts are a popular nesting site for the bird of prey and Phone masts will be unable to remove the nests until the chicks are hatched and leave, which could take up to three months.
article_snippet: We have to call in the experts to work out exactly where the nest is and We can then upgrade the current network or leave the nest alone for two to three months.'
article_snippet: They can sometimes nest on the mast itself which is like a big metal climbing frame or use the box underneath where the computer stuff sits.
highlights_snippet: Workers in £200m upgrade saw nests on church, hospital and office block .
  