Complex sentence: The Spires takes its name from a pair of steeples incorporated into its facade that were originally part of the High Barnet Methodist Church, the foundation stone for which was laid by Miss Wyburn of Hadley Manor in 1891.
Split into simpler sentences: The Spires takes its name from a pair of steeples incorporated into its street-front facade. They were originally part of the High Barnet Methodist Church, the foundation stone for which was laid by Miss Wyburn of Hadley Manor in 1891.