"Rich&Joe, the tower is out of focus!" OK I understand what you are saying. It is a depth of field issue. Your camera has focussed on the bridge, it is pin sharp. The tower is some considerable distance behind the Hungerford footbridge and with a compact camera I don't think you would be able to get both places absolutely pin sharp as you have seen on a postcard. I would imagine you used the zoom lens and quite a large aperture. The information should still be there in EXIF data on your image even though it is not the original. The postcard pic. was probably taken on a larger format film with a lens set at something like F22 to get the depth of field you have seen. Having said that I don't think it detracts from your image at all to have this slight dof difference. It more relates to the reality of the situation than the postcard. The bridge and tower are at least 1/2 mile apart. The difficult thing was getting the colours and you have done that perfectly, the sky is right as are the lights. I prefer the bridge to be the one that is in focus since that is the nearer object.

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html