BIG WING FLEX ON CLIMB-OUT 😮

United UA4 departs Heathrow on a relatively calm day.
I originally put this down to a possible Friction Layer at around 200ft on the climb-out. There’d been a few previous departures with jets getting ‘kicked’ sideways, some even ‘wing waving’ before straightening-up! But could this have been down to Wake Turbulence 🤷🏼‍♂️
What are your thoughts?