the less chance there is of mutations arising, or being selected. it'sjust like rolling a dice — the fewer times you roll it the less chance there is that you roll a six. there is still much to learn about the new variants and urgent studies are under way to see if the one first identified in the uk is more deadly. but the whole world needs to step up surveillance to keep ahead of this rapidly evolving pandemic. rebecca morrelle, bbc news. that is relevant for our next guest. we're joined by the vaccine minister, nadhim zahawi. we will talk to you about the vaccine and supply issues but another issue tied in closely to what we just heard and also we have spoken about this morning, is the discussion around quarantine for those who arrive in the uk. can you bring viewers up to date on where we sit with that?—