You can definitely get one. However it isn't clear whether it will be added as an IR(r) to your EASA licence or whether you will be given a second UK only licence with it on it, which can only be used in Annex II aircraft (after a certain date).
The documentation says you can't add the IR(r) after April 2014 (I think) to an EASA licence, but doesn't say that you can before that date (it only talks about conversion from a JAR licence).
The only way you will know how it will work is to get it in writing from the CAA - or find someone who has done it.
The IMC rating isn't completely dead yet - there is still lobbying going on, but it looks less and less likely that people will get it in the future (as I say above - you will always be able to put it onto a UK only licence, which can piggy back your EASA licence - but it wont be much use as its Annex II only).
Clear as mud