A British soldier leaning against a jeep. He's a corporal, possibly a sergeant (the armband may be covering a third stripe (chevron). The cap badge is very helpful by it's shape, despite the poor detail in the image.
The armband helps to identify the cap badge. The armband is a Military Police band, which was always worn on duty, and was a red MP on a black background, which is a good example of the detail that is lost in a copy of a copy of a black and white image. The badge is Royal Military Police.
The jeep can be identified as British, post WWII, by the tiny light on the wing above the wheel. These were fitted from 1949 onwards.
There's little else that's useful, except that I know that this is my Dad in Malaya at the start pf the Malayan Emergency, so I've cheated a little. I've "back-engineered" this image to show the little details that emerge when you look closely.
BTW, he swore that was a cup of tea in his hand, not a drink!