An NHS Commissioning Board spokesman told the Daily Mail:
In relation to Mr Walker’s specific comments, we know that he is unhappy about his personal case. Allegations made by Mr Walker regarding behaviour at the SHA have been independently investigated and found to be without merit. It is important to stress that allegations of this nature are taken extremely seriously. Following Mr Walker’s initial concerns raised in 2009 Sir David commissioned a rigorous independent review, following which it was concluded that no evidence whatsoever was found of bullying and harassment by the Trust or SHA.