I think we will probably beat Columbia. Southgate will be putting out a full strength side, including our current talisman, Harry Kane. That should be enough to ensure victory.
After that the competition will start to get really tough, and I've noticed over the years that English players, even those touted as brilliant, such as the somewhat overrated Wayne Rooney, don't seem too good against the very best sides, who seem to be faster, more accurate passers of the ball, and quicker thinking.
So we'll be lucky if we progress further, assuming we do indeed beat Columbia.