In reply to Nadir khan: You can always enter that shot next year as there is a 5 year limit on entries. I think the 'Shard' looks impressive in your photo but the rest of the image is average. To get shortlisted the image has to have something extra. Then again when I saw the winning entry 2 years back you do wonder what the judges are thinking. At the end of the day it is all down to the Judges' personal preference. If contemplating entry a good tip is to look at what got into the book published with each competition. The winner 3 years back had a lot of manipulation, so following criticism, there was a move away from too much Photoshopping. Also as it is essentially a 'Landscape' photo comp thatey are not too keen on figures appearing in the image. Last year a winter landscape was the outright winner, so don't expect the same this year. Possibly something about our unique weather we have be enduring. You really have to try and read their minds.
Then again, be true to yourself about what your photography is really all about. Best of luck.