By Jess Jones Jess Jones takes a look at why M&A activity in the PR sector is on the rise, and asks whether it will continue For the spinmeisters of public relations, advising clients on mergers and acquisitions is one thing, but managing their own company’s takeover is an entirely different challenge as many are discovering amid a rise in consolidation within the PR sector. Last month, London-listed government relations and lobbying group Public Policy Holding Company (PPHC) made headlines withits £30m acquisition of Pagefield – its first acquisition outside of the US, where the company is ba…