Do you add any flavor of British breakfast tea? I need to know how it is prepared; either with or without additional flavor.
The British tea? Don't know what that's all about. Anyway...
English Breakfast Tea is a mixture of Assam, Ceylon and Kenya teas that is often served with a dash of milk and sugar to taste. The UK Tea Council discusses their view of the appropriate way to serve each variety at the supplied link. I would think that a great majority of British people take their tea with milk (I don't find the type of tea used palatable without, as it is somewhat bitter and high in tannins, and I don't think many other people do either). When I say a dash, what I mean is somewhere in the region of 10% of the volume of the cup, rather than the half and half or thereabouts used in beverages like chai.
Most British people (in my experience at least) use teabags which are simply added to the cup and hot water poured on top. However adding several spoonfuls of loose tea to a teapot is not uncommon, as was probably done for millennia wherever tea was drunk, prior to the invention of the teabag.
What I thought of when I read this question was what my mother and grandmother taught me about preparing tea, and the key thing was that the milk has to go into the cup before the hot tea so that you do not scald it!
Here is a kind of over-the-top Instructables describing how to prepare tea correctly! Step 5 describes getting the tea into the cup.
Let the tea in the tea pot stand for a few minutes for the tea to brew. The tea cosy will keep the tea warm for a long time. Take your tea cup and saucer (prererably of the finest English bone china) pour a little milk into the cup (milk in first, please!) and then fill with the clear, hot, amber liquid of life! Add sugar to taste and there you are!