Band blame split on 'creative differences'
Avenged Sevenfold will play the Friday night of the bash
Meanwhile, Ellie Goulding remains top of Official UK Singles Chart for third week running
They lead a list of five new albums inhabiting the top five spots on the chart
US band will perform in Manchester, London and Birmingham in November
California metallers confirm they will begin work on their sixth album next month
Band make their first UK festival appearance since drummer's death