London

The simulation of a terrorist attack has been six months in the planning.

The exercise - codenamed Strong Tower - involves 1,000 police officers at locations across the capital until Wednesday afternoon.

It comes days after 38 people were killed by a gunman in Tunisia, the majority of them British holidaymakers.

The Metropolitan Police says that this week's exercise in London is not based on any specific intelligence and is part of a long-term strategy of planning and preparing for all possible types of terrorist attack.

More than 300 business leaders, from the United Kingdom, as well as Europe and the United States, have been given new insight to the economic growth of Papua New Guinea and potential returns on investment.

In his keynote address at the inaugural United Kingdom - Papua New guinea Trade and Investment Forum in London on Tuesday, the Prime Minister, Hon Peter O’Neill CMG MP, provided perspective to ongoing economic development.

"Stability, responsible management and growth is what we offer to you,” Prime Minister O’Neill told the opening session of the forum.