Yes, Meghan obviously studied beforehand. So many people think that the Royals just roll up, wave to the crowd, make meaningless small talk, come out and wave to the crowd again and zip off. Time and effort went into preparing for that engagement, as it does for all working royals. I have to admit I get irritated that people fail to give credit where credit is due.
One other aspect of this visit to Brixton. On 2 Jan NBC was there trying to stir up some negative and, if possible racial, discontent. They had a few people saying it was all just a publicity stunt but, if someone asks if something is a publicity stunt they get a yes it is, or no it isn't. I read some more from other outlets earlier that day and it was the same people being quoted. But you can see by the way the visit was handled by the Police and how edgy the RPO's were. They were all prepared for if not an actively hostile crowd, at least a negative one. Instead, I think the crowd they got blew them all away.
Harry and Meghan got out of the car and stayed on-script right up until he told her to turn around. The atmosphere and was electric and loud, very, very, loud. I had my sound turned way up because of roadworks and it must have been a break because suddenly the sound was earsplitting! You could see when Harry realised this was a happy party crowd as opposed to what they had probably been told to expect.
To me, both Harry and Meghan's reaction was pure gold. Both looked initially gobsmacked to realise the crowd were calling for Meghan and Harry, when he realised that, told her to turn and wave. The Police and RPO's must have been cool with their unplanned walkabout before the left or it wouldn't have happened. But, it must be humbling to see ordinary people so pumped about them and especially about Harry's Lady. He holds her hand or introduces her by gently putting his arm behind her and moving her forward (a very Frederik move that) like he wants everyone to see what he sees and fell in love with. Pure Gold!