Unintentional clones
If you were to wake up randomly in a park or playground, having lost your power of hearing, in my opinion you could still pretty quickly work out if you had landed in the UK despite not being able to hear the language being spoken.
How? Just a quick glance at the fashions being sported by the mums.
As with any culture built by humans with an innate need to fit in, we have developed different uniforms for different roles in society. In England the uniform is fairly clear for a trip to the park with the kids. If you are less than a UK size 12 and therefore can get away with skinny skins, or Jeggings, these will be your uniform of choice. Combined with a fairly snug Tee, or a fitted smock top (the sort that look like a mini dress but are worn with leggings.)
However, you might, like me, be unable to find a pair of skinny jeans or Jeggings that actually fit your hips. You may, after all, have hips, and an hourglass figure, that the manufacturers of fashion often forget exist. For you, the trip will, despite your better intentions, probably result in the Sweats uniform. You'll have plenty of pairs of sporty tracksuit bottoms from all the good intentions of joining and subsequently not attending the gym. Add a bland v-necked T-shirt and you can kid yourself that everyone will assume you have come straight from Yoga class to the park.