This week's Brexit downsides: half a billion in extra costs to import food, the collapse of trade talks with Canada and more.

Farmers will no longer have to follow EU regulations in areas such as reducing agricultural runoff into rivers.

UK has not reciprocated after EU banned import of pot plant soil, in which some species can travel undetected. / Invasive species are increasingly likely to come to Britain because of lax post-Brexit trade rules, experts have warned.

Cricket pitch soil in Northern Ireland may have to be dug up and replaced due to post-Brexit protocol arrangements, according to officials for the sport in the province.