LUCKNOW : Amid concerns over a new variant of the coronavirus detected in the United Kingdom, Uttar Pradesh Chief Minister Yogi Adityanath said on Wednesday that those who came to the state from abroad between November 25 and December 8 should undergo tests for detection of COVID-19.Those who arrived in UP from abroad after December 9 must undergo RT-PCR test, he told officials at a review meeting.Also Read | How hunger came back to haunt IndiaIndia has suspended all passenger flights connecting the United Kingdom from Wednesday till December 31 or till further orders in the wake of the emergence of a mutated strain of the virus there, joining several other countries that have imposed a similar flight ban.The Union Health Ministry also.