Two cases now in the UK, Chelmsford (or Colchester, one of the two) and Nottingham - both linked to SA travel. So it's quite reasonable to assume there's likely to be many more out there.
Every indication from Boris's briefing tonight that restrictions - particularly face masks on transport and in shops - will be re-imposed; Javid to specify next week.
It's a bit of a rolling ball game at the moment until more is known about this latest variant.