Experts are warning that an "unprecedented" bird flu outbreak has caused a huge spike in culling since last season.

According to figures from the World Organisation for Animal Health (WOAH), more than 22 million cases have been reported in wild birds and poultry so far this season in 68 countries.

This figure is double the 11m recorded between October 2020 and September 2021, itself an all-time high.

In an effort to curb the outbreak, 94.2m farmed poultry have been killed and disposed of.