Professional distance runners like Kiplimo typically run in excess of 130 miles per week, with at least two hard workouts and a long run of 20-25 miles. He will probably return to that level for most of March and a week in early April. The London Marathon isn’t until April 28, and 10 weeks is plenty of time for him to get a mini training block in.
Yeah, as the other commentator mentioned, it practically just means he won't be entering any other competitions until April. He'll probably cover >1000 miles in training over that period :)