Here you go, MrB.
Unless one happens to know that the CAA call their fees document the "Scheme of Charges", it's not easy to find.
It appears from a quick squint that the IMCR application fee 2012/2013 is £89.00 (see Table 5 (f) on p6: "Any other rating or qualification not shown above").
As an aside, I wonder how much the Government charges for a licence to print money...?