By Emma Mackenzie The last few months have been some of the most challenging that Prince William and the rest of the Royal Family have had to deal with in recent years, but amid all of the difficulties, an expert has claimed that the Prince of Wales has been able to lean on someone who might seem an “unlikely ally”. After Princess Kate underwent abdominal surgery in January she remained out of the public eye as she recovered – and for weeks, there was intense speculation online about the status of her health, but little did the public know that behind closed doors she had been diagnosed with c…