Michael, you seem to carefully avoid addressing the question of the event being restricted in its growth by the various controls suggested by instead launching brickbats at the people who raise concerns.
I'd be happy for the event or any event to continue at the Horniman provided it was within the terms of its existing alcohol and entertainment licence, which is 5000 maximum as confirmed with the Council and is what all other events comply with. The Cook Out event has the potential for 20 000 as we have seen. I gather that you would rather see the event curtailed in numbers attending solely in order to keep it at the Horniman so I hope the organisers and attendees/potential attendees agree with you and that it works financially for them, as this is realistically the only way the event can continue at this location.
I have suggested that time is better spent looking for alternative venues that keep it in the area/south east London/Lewisham which I think will be the best that can be achieved, but if blinkers go on re the Horniman or nothing then even that might slip away.

With respect,you also live in a cul de sac well away from the fray so you probably won't have the experience that many of us did re noise and commotion from frustrated parkers expecting us residents to have already moved out for the day, so please don't criticise the rest of us who are more immediately affected and hence more concerned.

As for sentiments such as 'lets welcome people coming to the area' and views expressed about people being too concerned about parking capacity in their street, I assume now from this that previous views about the Tyson Road proposals have now gone into reverse and the FHS is now open and welcome to this wonderful new development in its entirety and will be supporting the new planning application wholeheartedly. The high density proposals will bring a large number of people into the area and no doubt economic benefit. With all these additional cars arriving with them hopefully our local petrol stations can stay in business.