I see that you give your location as London, so you will not have the same sort of freedom of airspace that we have in Wales. So maybe you are more concerned with your ability to Navigate safely, and legally. Have you followed the modern trend of using GPS, and I Pad apps, which you will have to be familiar with?
You could try a flight away from any airspace, by following a coastline and landing at Clacton or Southend.