Hello when i bought my flat i knew that the kitchen floor was not level however i went ahead and put vinyl over it. This was over 5 years ago and i have now decided i want to fix the situation. I have attached pictures of what is under the vinyl. It is a 2nd floor flat with a property under the kitchen, they have never complained about their ceiling falling down etc.
a) what is wrong
b) How can it be fixed
c) what sort of tradesperson should i be contacting to do this eg builder, carpenter, floorfitter