Complex sentence: On 15 February 2013 a single-decker bus travelling towards St Ives had to brake hard owing to horses on the guideway just after Swavesey Crossing, this resulted in a double-decker bus crashing into the rear of the single-decker bus.
Split into simpler sentences: On 15 February 2013 a single-decker bus travelling towards St Ives had to brake hard due to horses obstructing the guideway just after the Swavesey Crossing. This resulted in a following double-decker bus crashing into the rear of the single-decker bus.