Beer prices and missing children: a London mystery nobody asked for

Been in London. Thoughts: 1) £6.45 a pint 2) Not seen a single buggy/pram/pushchair, or any young kids that weren't obviously tourists 3) rainy day in Feb but much quieter than I remember ever being before 4) and cleaner 5) what's the point in Warren St station? 6) £6.45