A TERRORIST plot to allegedly blow up aircraft in mid-flight has been thwarted in a joint intelligence-led operation by the Metropolitan Police's anti-terrorist branch and security service, the force said today.

A TERRORIST plot to allegedly blow up aircraft in mid-flight has been thwarted in a joint intelligence-led operation by the Metropolitan Police's anti-terrorist branch and security service, the force said today.

It is believed that the aim was to detonate explosive devices smuggled on board the aircraft in hand luggage.

It is believed that the attacks would have been particularly targeted at flights from the UK to the USA.

Overnight, police have arrested a number of people in London. Today's arrests are the culmination of a major covert counter-terrorist operation lasting several months.

Following this morning's police action, security at all UK airports has been increased and additional security measures have been put in place for all flights.

Government advice to travellers (Home Office site)