The park will partially be indoors.
"London Paramount says it will feature attractions conducive to parents, children, and thrill-seekers. The "heart" of the resort will be an indoor, covered and open-air experience that will host a couple of exhibitions and music events. Every day, during afternoons, there will be a "Paramount and Friends Carnival," where costumed people and themed rides take place."
Tickets are also supposed to cost £57 once openedSource