Architect Andrew Arrol says it takes many years of designing buildings before you feel confident in taking on a project such as this. He says the new development will have to slot into the site seamlessly in a way which doesn't intrude on those buildings around it.
More top news
A 23-year-old man who died after being shot in broad daylight in a Sheffield street has been named locally.
A 23-year-old man has died friom his wounds after being shot in Sheffield this afternoon.
Weather update: Exceptionally mild temperatures for the time of year.