Rhino horns, hippo teeth and live big cats are just some of the endangered animal items seized by border officials in a record year.
A witness statement given to the high court claims that the information seized contains information which could directly endanger lives.
The independent reviewer of terrorism legislation said he will examine the detention of David Miranda at Heathrow Airport.
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."
The Home Secretary Theresa May will make a statement on the missing terror suspect to the House of Commons at 3.30pm today, the Home Office has said.
A Home Office spokesman said it is "committed" to ensuring that the most vulnerable asylum seekers, such as unaccompanied children, "are treated fairly and sensitively".
We have accepted all nine of the Chief Inspector's recommendations and have already issued new interim guidance to caseworkers giving practical information on family tracing.
We have also amended the training course for all new case workers to ensure it includes updated guidance on family
The Refugee Council said the UK "has a long way to go" after an inspection found border officials failed to trace the families of nearly two-thirds of asylum-seeking children who arrived in the country alone.
Policy officer Judith Dennis said:
While we welcome many of the findings of this report, it clearly shows that the UK has a long way to go before children in the asylum system have their claims properly assessed and have their welfare sufficiently safeguarded.
Children should be treated as children first, regardless of their immigration status.
An inspection found that unaccompanied asylum-seeking children were less than half as likely to be granted asylum in London as in the Midlands.
According to the report:
- In London only 15.3% of unaccompanied children were granted asylum
- That compares to 37.5% in the Midlands
Asylum decisions for unaccompanied asylum-seeking children took an "unacceptably long" average of 141 days in the Midlands - double the 64 days taken in London, report author Chief Inspector of Borders and Immigration John Vine said.
Border officials failed to trace the families of nearly two-thirds of asylum-seeking children who arrived alone in the UK, an inspection has found.
The Home Office has a legal obligation to try and find family members of unaccompanied children - but the Chief Inspector of Borders and Immigration John Vine found this was not done in 60% of cases sampled.
Tracing may enable children to be reunited with their families, Mr Vine's report said, and may also help the Home Office decide whether to grant the child leave to remain if the asylum claim fails.
How many people went home because of the immigration vans? The immigration minister said one, but the Home Secretary now says "some."
Home Secretary Theresa May has told MPs: "We won't be rolling out the ['go home'] vans. They were too much of a blunt instrument."
Number 10 has confirmed "there will be no further roll out" of the 'go home vans'.