I love plane spotting. It is one of my favourite things to do to pass time if I am ever bored.
I live about 25 miles west of Heathrow airport so there are always planes flying up above.
I use the Flightrader24 app to get a lot of data on the planes flying up above. You’ll be surprised how much you can find out about a plane just by launching the app and pointing your phone to the sky. You just don’t realise how many planes there are in the sky above you at any given time.
Their website is also good if you’re on a desk/laptop.