From page 13 of the UK CAA SRG policy update document:
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IR Course: Credit allowed for holding IMC Rating UK Licence Holders
As advised in CAP 53/54, a UK licence holder with a valid IMC rating is allowed a credit of 12 hours from the minimum approved training requirement for the Instrument Rating (IR). AIC 5/1999 explained that, within UK national arrangements, IMC rated pilots could still benefit from this 12 hour credit from the 50 hour (single engine) or
55 hour (multi-engine) approved IR courses. However, that credit is available only to holders of the UK PPL(A) or the UK CPL(A) and
only during the transition period up to 30 th June 2002. For the UK CPL holder who receives this 12 hour credit, the IR course cannot be further reduced by the 5 hours allowed in Appendix 1 to JAR-FCL
1.205 paragraph 12.
Holders of JAR-FCL licences (including the JAR-FCL CPL (Restricted)), may not benefit from the 12 hours credit based on the IMC rating, but a JAR-FCL CPL holder would be eligible for the 5 hour reduction in accordance with Appendix 1 to JAR-FCL 1.205.</font>
The full document in PDF format can be found and downloaded here:
http://www.srg.caa.co.uk/documents/s...licyUpdate.pdf