The diagnostic device recorded the following problems:
1) Diesel intake air flow position sensor-circuit high (as a permanent fault PO2E9-73)
2) Diesel intake air flow control stuck closed, check /clear throttle valve from obstruction/sticking (as a temporary fault PO2E5-71)
Does anyone know, what I should do and second if this a serious fault that I should go ahead and repair it, or it is something that I can leave it for later when it gets worse. However, I don't want to risk to have my car break down in the middle of nowhere.

Sounds like throttle body problem ? 3 x FL1 2 manual + 1 auto
5 x FL2 4 manual + 1 auto
Now Discovery Sport P250 MHEV SE

Sounds like the Throttle body problem, you say? Care to elaborate?

My recently bought 59 plate TD4e has just thrown this P02e5 code as well. Is there an easy fix?

UPDATE:-
My fault light went out after dismantling the top intake piping. Someone on another forum said something about it being to do with the Mass Airflow monitor. Could be that just fiddling with the plug onto that cured my problem.