I am so confused by the array of choices out there and don't even get the terminology - buggy, stroller, pram, etc etc!
Basically I live in London and expect to be using the tube mostly and sometimes buses. I intend to use a sling on the whole, but want to have a buggy (or whatever they are called) as a backup option for the newborn and also for if s/he doesn't like slings.
What is THE best buggy for using the tube and getting round London? e.g. light, small, no hassle, easy to manage, pick up, take down escalators etc?