@Shahadi - No spoilers from my side, but I have chosen such "daring" approach because there is a major base in the city nearby. If Brits would be stopped on the desert for long enough for reinforcements to come... that would be an end of entire Para. Dropping inside the walls gives them protection and advantage against these reinforcements.
But yes, as mentioned, this one is tough and is sort of example when "Intelligence did not do its best".
@Oche - hats off-head for trying this one on PBEM
Do you happen to have some masochistic tendencies maybe?