Just to add a note on this. I work the Shannon FIR occassionally and I must say that MOST VFR pilots are excellent to work with. However, I think most also think they are being provided with a RADAR service. Technically they are not. They are simply being provided with an information and alerting service. Althought we use radar to give us approx positions on aircraft, because VFR's are so low, they fall in and out of coverage. So its not always possible to provide accurate position info. Ye know yourselves....VRF (Very F****ing Risky...its SEE and BE SEEN!!!) Unfortunately, mistakes are made and there are misunderstandings from time to time between controllers and pilots alike. I keep saying, just use sandard phraseology and this will minimise anything going wrong.