Seven West Media says its half-year net profit has fallen by 13.8 per cent as stringent cost-saving measures failed to offset a fall in advertising revenue, with the group flagging further changes including at its WA operations.

Seven West Media says its half-year net profit has fallen by 13.8 per cent as stringent cost-saving measures failed to offset a fall in advertising revenue, with the group flagging further changes including at its WA operations.