reporter mark lobel. one potential change could include pcr test, everybody coming to the uk needs to do one of these. now, the travel industry says they are too expensive, but the government says they are necessary to track new variants of concern. some people don t think the current system actually achieves that very well. have a listen to this from the chair of the uk parliament s transport select committee. backin transport select committee. back in february when fewer people back in february when fewer people travelled, about 50% of all pcr people travelled, about 50% of all pcr tests were sequenced, those all pcr tests were sequenced, those that were positive. for the first those that were positive. for the first three weeks ofjuly, helf the first three weeks ofjuly, half a the first three weeks ofjuly, half a million people came back to this half a million people came back to this country, to pcr tests, 7000 to this country, to pcr tests, 7000 people tested positi