Complex sentence: The pro-union campaign disclosed its donor list on 6 April 2013 and donations of more than £1.1 million (US $1,866,000) had been received from approximately 9,500 donors.
Split into simpler sentences: The pro-union campaign disclosed its donor list on 6 April 2013. Donations of more than £1.1m had been received from approximately 9,500 donors.