Grant Miller, senior officer on the Convention on International Trade of Endangered Species (CITIES) Border Force team at Heathrow has said the market in endangered animal items being trafficked into the country is evolving.
He said there is a significant increase in items in such as ivory from west and central Africa being trafficked through London's "logistic hub".
"We pick up between 5-15 kilo of ivory at time. The heartbreaking thing is it quite clearly new ivory from recently slaughted elephants."
More top news
The International Olympic Committee's (IOC) has ruled out a total ban on Russian athletes after revelations of state-sanctioned doping.
Burnley have apologised to Bradford after one of their supporters was ejected from Saturday's pre-season friendly at Valley Parad
Two British schoolchildren seriously injured in a coach crash on the Swiss border remain in hospital in France.