South by Southwest has revealed the first wave of films and keynote speakers for the film program of its U.K. spinoff festival SXSW London , which takes place June 1-6. Among the speakers will be actress, writer, producer and director Sharon Horgan , whose credits include “Catastrophe,” “Bad Sisters” and “Motherland,” screenwriter and producer Russell T. Davies, known for “Queer as Folk” and “Doctor Who,” and Tom Quinn , founder of U.S. independent film company Neon, which released Oscar