Jwscud, mad_jock, AutoBit, thank you all for your respective views on this. I had a feeling the frequencies would be an issue also, so I do try and practice memorising things. In my current job I work a lot with long order numbers that I get over the phone then have to enter into our system to review, I don't write these down but force myself to memorise them, and even after a couple of weeks of doing this it has made a big difference. I find I can make my mind do anything as long as I train it to think in that way, which is a bonus.
Great to hear that Military pilots, 737 pilots, prop pilots AND 747 pilots all have it, I feel inspired. No real reason now at all why this should ever hold be back, and I hope it does make me better at piloting even if groundschool may be a struggle. I know the accusation always flies about (excuse the pun) that pilots are button pushers but ultimately flying is the skill that sets pilots apart.
Many thanks all.