By Eunan McConville
By Rachel Schraer
Health and disinformation reporter
By Imogen Foulkes
BBC News, Bern
Some of the variant's mutations have 'worrying characteristics,' says WHO Covid Technical Lead Dr Maria Van Kerkhove.
By Daniel Thomas and Michael Race
Business reporters, BBC News
By Jayne McCormack
BBC News NI political correspondent
By The Visual and Data Journalism Team
Northern Ireland's chief scientific advisor says the variant could be more transmittable.