Hello AMEandPPL,
Many apologies for the late reply as I have been away for a few days.
Really pleased with your reply and explanation, you've extremely helpful and Im grateful for your help
Yes its correct I have 6/9 vision in my left eye (just) this was confirmed by my local optician as being so.
Thanks again for your help,
Much appreciated,
Pistonprovost (Nigel).