Comment by varispeed

Problem with the buses (at least in London) is that they don't come very often, get stuck in traffic (getting in and out of the bus stop takes forever), often are full and full of feral youth at certain hours, they smell of piss and weed, you need to carefully inspect seats to not ruin your clothes with freshly placed bubble gum and then drivers often take breaks at random, so not only it is slow, the driver will announce evening out of the system and puts their feet up for 10-20 minutes.

If you are able bodied, most journeys you'll arrive quicker by just walking (just be mindful of drug peddlers, mental health cases, poo and maniacs on the scooters).