British Army boots are also known as ammunition boots. The current boots worn by British soldiers are designated as boot combat high leg (BCH). A traditional way of lacing British Army boots is called the King's Tie or King's Lace method. The rationale behind this and other lacing methods is to mitigate some of the discomfort of wearing sturdy leather boots for long periods of time.
First tie a knot at one end of your lace so it will not slip through the lace holes.
Starting from the bottom of a boot, slide the knotted end into the bottom of one of the lace holes so the knot is on the inside of the boot.
Slip the lace through the other lace hole from the top and then up and through the next lace hole.
Repeat this process until you reach the top of your boot. After you have laced all the holes, loop the rest of the lace around the top of the boot and place the end of the lace through the wrapped lace.