Gaz, you might find this handy at some point in the future ...
ColinJ's Guide to Bananas
Bananas are a great source of energy and essential nutrients like potassium.
Edible bananas (the ones you see in the shops) do not have significant seeds in them. (They grow on sterile plants produced from offshoots of other banana plants.)
Apparently you can eat banana skins but I never have! Also, you can cook with bananas, but I've never done that either.
Bananas are really nice in milkshakes and smoothies, suitably blended.
Bananas are handy for cyclists but very ripe bananas bruise and blacken easily, becoming very mushy so it is best to handle them with some care.
Bananas are picked while unripe. When they are like this, they are green, hard and starchy. Refrigeration to a particular temperature keeps them from ripening while being transported. When they arrive at the wholesalers, they are warmed a few degrees and might be exposed to ethylene to start the ripening process. They will then be sold. You may see them sold in the shops still green to some extent. It will take them a few days extra to become ripe enough to eat. If you want to eat them soon, buy yellow ones. If you are buying ahead, buy greenish, or buy a mixture so some are ripening while you eat the others.
As bananas ripen, the outsides start to turn yellow and the starches inside start to turn to sugars. They become sweeter and softer. If a banana has been transported, stored and sold the right way it will ripen like this. If it has been mishandled it may never ripen properly. Most do, though.
A ripe banana stored in coolish conditions will last a few days before starting to become over-ripe. (Some people like them like that.) The skins start to develop brown spots which get bigger until the yellow finally disappears altogether. They become very soft inside, even mushy, and very sweet. I prefer them well-ripe but not over-ripe. An over-ripe banana is not good to carry in a jersey pocket because it will quickly become a mushy mess.
Sometimes when you peel a banana, little stringy bits are left on the fruit inside. If they annoy you, just tug them off and discard them. (It's an appearance thing, they don't taste funny.)
If/when you get round to eating bread - banana sandwiches are yummy!
Enjoy your voyage of discovery!