For the UK I hit some dead programs (ex. Sirius, which is supposed to be one of the endorsement options for the Tier 1 Graduate Entrepreneur visa). Is it because no one knows how Brexit will affect the rules? Just this program stopped being interesting or is on temp hiatus?

I do think it's pretty neat that just getting into an accelerator in the UK can also help with your visa process (endorsements for entrepreneur visa)

http://www.siriusprogramme.com/apply https://www.gov.uk/government/publications/entrepreneurs-set...