African elephant populations face possible extinction within a decade because of ivory poaching, campaigners have warned.
The WWF said that both black and white rhino are under unprecedented attack for their horn, which is being traded as a lifestyle drug, while wild tiger numbers across Asia have dropped by more than 90% in the last 100 years.
At an event today the Prince of Wales and the Duke of Cambridge will speak alongside Environment Secretary Owen Paterson to guests from countries affected by the illegal wildlife trade.
They will urge for stricter laws against the criminals involved and help for rural communities to find viable alternatives to illegal wildlife trade.
More top news
In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".
Weather conditions remain wet and windy through the weekend.
Mr Banks has given Ukip leader Paul Nuttall an "ultimatum", saying if he is not made chairman he will stop supporting the party.