It is interesting that, from Hogsmeade, one will have to wait in line for the HE and then after 3-4 minutes of entertainment, you will exit out into the streets of London, only to have to get in line and wait yet again to get into Diagon Alley. What a slap in the kissuh that will be. On special vacation days, the same will apply to Hogsmeade. "Welcome London/Hogsmeade! Now, if you will please wait for 3 hours in this line to visit the attraction."