It may interest you to know that here in OZ we have introduced a ppl imc rating a couple of years ago following years of lobbying the powers that be. While it does not allow instument approaches as it is an enroute instument rating it sounds simular to the UK one. I can only say it was a long time coming here and thankfully it has finally become possible to legally fly in cloud enroute and save many anxious moments trying to stay visual in marginal conditions and therefore must be safer.