Thanks - I think I've got it now.
IMCr/IR(r) - allows me to fly IFR in class D and above in the UK and fly approaches and takes me 15 hours plus test (no airways flying)
Separately I can gain an EIR which will allow me to fly in class A airways all over Europe and take me another 15 hour (no approaches in mainland Europe)
Then I can do another ten hours to take me to the minimum for a full IR which will allow me to do all of the above plus fly approaches in mainland Europe.
And for the EIR / Full IR I need to do the new IR ground syllabus.
I realise that the above is overly simplistic and based on minimum hours but is that about the size of it?