Upvote:1
A NOC is technically not required; although it can be used to validate home ties. However, a NOC without specific details about your trip (at least the dates should be there) is not that useful - it may have the opposite effect.
Do you have all the other requirements in place?
If so, you can then submit your application.
The exact number of days you are staying in London does not matter, as even for a 3 hour stay you would need some sort of visa.