Complex sentence: These plans were abandoned by a new Vice Chancellor in the early 2000s but consent has been granted to broaden the channel into Castle Street and to replace the old, formally modelled, high walls with more fluid, lower, Modernist ones.
Split into simpler sentences: These plans were abandoned by a new Vice Chancellor in the early 2000s. But consent has been granted to broaden the channel into Castle Street and to replace the old, formally modelled, high walls with more fluid, lower, Modernist ones.