It's been investigated, Yak. As Grist points out, the statement yesterday follows criticism of Wiltshire Police for spending so much money doing so.

The statement yesterday - that there would have been grounds to interview him under caution - is legally meaningless. It simply indicates that there would have been reasonable grounds to suspect, which would be the case simply because credible (i.e. not inherently unbelievable) allegations had been made

As I said earlier, this is a lose-lose situation where both Heath's family and the alleged victims will be denied the 'closure' that a court case would bring.

Had this been a case where an allegation had been made about an 'ordinary' member of the public, the police would have said 'sorry there's nowt we can do'. What we are going to see now are people ignoring the principle of 'innocent until proven guilty' for political purposes.