On the exam front - If you were to assume all the theory exams were completed on 01/01/2012, these would continue to be recognised for two years (thus until 01/01/2014).
Two examples if you like would then be:
1. If the skills test was also completed on 01/01/2012, you would then have until 01/01/2013 within which to complete the RT exam and get the licence (due to the 1 year validity of the skills test).
2. On the other hand, you could also complete this skills test at the beginning of 2013 and you then have until 01/01/2014 to get the licence. (Again due to the 1 year validity of the skills test).
So in summary, providing the RT test is completed and licence obtained within 1 year of the skills test AND within 2 years of completing all theory exams then you are good to go.
The RT test should simply be completed within the two year validity of the theory exams, so would naturally be done correctly if the above timeframe is used. LASORS B1.2:
The RTF written examinations and practical test for a stand-alone licence are valid for a period of 12 months for licence issue. Where a candidate completes the examinations for a FRTOL in conjunction with a course
of training for a JAR-FCL PPL, the validity of the radiote- lephony examinations may be extended to 24 months from • the date of passing the last PPL theoretical examination, provided that all examinations are passed within a 18 month period and that application for both licences is made concurrently. PPL holders who subsequently wish to obtain a FRTOL will be required to complete the practical Communications test and apply within 12 months.
Since LASORs can be open to individual interpretation at times it's always recommended to give the CAA a call if ever in doubt to double check all will be ok!
Jim / others... please chip in should you have any further thoughts!