Zuckerberg is both very keen on delegating to the relevant party (he has no pride, and not always all the context), fully aware of British Parliament focus on being a brilliant orator (and it is a political maze) and aware how his presence sends a signal of gravity.

They will need of that all.

I think that sending “only” the Chief counsel Colin Stretch to the US Parliament was seen as a snub and they will want to correct that. The stock drop hurts: Mark sees that as his own performance review and the drop was large.

- Nicola Mendelsohn CBE (Commander of the Most Excellent Order of the British Empire, a British high-ranking title) is the CEO of the International holding (based in Dublin); as her title indicates, she’s in Whitehall as a fish in water and she’s certainly already making sure everything is fine; I’m not sure she will speak publicly, but she will absolutely brief the speakers on who is on the committee, so look for her in the delegation;

- Sheryl Sandberg is widely seen as the politician whisperer; I can’t imagine her not close to this; she’s more soft-spoken than other in this list, the most European in the team and a good orator, especially when things get complicated; I’d recommend her as she’s the recognised “grown-up”: some of Mark’s star power and closer to the age group of the committee;

- Elliot Schrage, Head of Comms, PR (& somehow also Legal); he is a fixer and the kind of attorney claiming his bloody-handed client is innocent; he’s directly involved in most of that and I think not sending him would be a mistake; he can be a little too American and brash for something like Whitehall so I would definitely make sure he’s properly trained, but that guy could sell them their own shirts and get paid a commission for the pleasure; I was surprised that he wasn’t at the US Commission hearing;

- Colin Stretch, Chief Legal counsel, didn’t made a great showing in the US, so it’s unlikely he’ll speak, but I can’t imagine he won’t be close;

- Boz who twitted about it would make sense, as he’s still the head of Ads and I believe was in charge of the Platform at the time, but he kind of already burned himself with the argument that it’s not a “data leak” and might not play well.

- Chris Cox has a notoriously staggering reality-distortion-field. He’s a probably billionaire with Facebook but would likely have made more money as a cult-leader. Works well on larger, more passive crowd, but this is an angry committee looking for his pound of flesh -- I’d be surprised, but if he talks, I would demand all of you watch it, because that is probably going to be spectacular public speaking, even by the Parliament’s high standards; Chris had been to London earlier in the past years (there are many product teams there); whether the felt this was productive might influence if he find the time to come back;

- for the rest of the leadership committee: Mike Schroepfer (CTO) has a real work to do, and is less relevant; I don’t know Dave Wehner (CFO) but he’s probably less relevant too.

Mark works with all those (and a handful more) as a close committee and I suspect that he mainly limits travel to avoid being too far from that committee for too long. To avoid breaking that, it is possible that most of those people show up. It will be disruptive of many of them to go, but it will send a strong signal and they can reach out to different members individually more effectively that way.

Facebook has misunderstood why European countries are trying to regulate them since their opened the service internationally. Getting at least to understand how UK see what they are doing would help. I would encourage them to reach out, as UK is the easiest to understand in detail and the closest to the US system.

On the other hand, Facebook would be keen to downplay the incident and might not send senior people -- but that’s misunderstanding British politics.