Couldn't resist

Generally, tea bags tend to have the less desirable parts of the tea leaves (ie stems) so they are cheaper, but the quality of the tea is diminished. Loose tea is mostly just the pure leaves and so is more likely to have the full flavour of the leaves. Some people say that even the paper/cotton tea bag can take away from the taste (especially if it's bleached paper/cotton), but I haven't noticed that especially.

@unicycle I AM British! And yes you should squeeze the tea bag against the inside of the mug to get the most you can from it. You won't need to do this if you're using a tea pot (and therefore tea cups) or a tea infuser. Most people use sugar but obviously you can use artificial sweeteners, honey or other natural sweeteners.
Thank you @potassiumboron my method is superior

@peachypersimmon Squeezing the bag releases tannins which makes your tea bitter (especially with black teas). By trying to "get the most you can" you've potentially ruined your cup of tea. Sugar is really a matter of preference but I wouldn't say "most" people use it. Sorry but your method is shit. ;) (Though I will admit honey can be good in some kinds of tea).

Sugar is the most common form of sweetener used (hence why I said most people use it).

Sorry, I misunderstood. Anyway, I think the point here is that every British person thinks their method of making tea is the best method, though I think we can all look down on those fuckers who put the milk first.

I just made a cup of tea, squeezed the teabag against the side, and it tastes great. But yes, you're right @unicycle. I don't know what possesses a person to put the milk in first. I'll never quite understand it.

Exactly :) you only put milk in first when you make coffee not tea.

what? no?? milk never goes in first unless you want a cup of milk

You put milk in coffee first to stop the coffee from being burned.