Can YOU find the hidden letter? Test promises to prove if you have a photographic memory - but only one per cent of people will pass

If you suspect that your ability to memorise is greater than most, a puzzle promises to prove it once and for all.

First look at the picture on the left until you have memorised it and then move on to the image on the right.

Then try to combine both in your mind's eye to see if you can form a letter of the alphabet. 

The test is part of a 'photographic memory' quiz which it's said that only one per cent of the population will pass.