Can I use my bus pass on London buses?

I have used mine in London and Essex. I live in Kent

The TFL Go app is really useful to have on your phone if you are travelling around London and aren’t familiar with the routes. You can tap in your destination and it shows you which bus to take, where the nearest bus stops are, how long you have to wait for the next one, suggests alternative routes, there are tube and train maps on it as well.