Coronavirus restrictions should not not ease until next year because of aggressive mutant strains, according to researchers.Despite access to vaccines, the UK need to be under a certain level of lockdown as jabs are "insufficient" to allow normality "within a year," say scientists.If restrictions are eased it could lead to thousands of hospitalisations and deaths.The conclusion has been reached by researchers who modelled what could happen in the next few months with the vaccine rollout.Scientists presented their findings to Sage on January 14, and concluded the likelihood of "further disease" if restrictions are eased.The document presented by Warwick University researchers says: "With the new aggressive covid strain, likely transmission.