@Jay *****************
Obviously you can see things that are not there.
In Immigration rules is clearly described that a visa is for a purpose of visit, and that Immigration can check for your visit matching the purpose.
For non-o you agree with this, because tou say it is conditional, for DTV you don't agree with it.
Nowhere is written any exception for DTV that it will loose its requirements once it is issued.
That will not make any sense, but you keep shouting requirements drop the moment the visa is issue, but you cannot show any kind of proof of your fantasy.
Just keep dreaming, visa requirements stay in place during validity unless it is stated different somewhere.
Maybe it is a good idea to put you together with Christopher Killcourse on my blocking list, you two have a lot in common.