Opening of HUGE new terminal

Security has been beefed up big time at Heathrow today.

The Queen is at the airport to open the brand new terminal 5.

But it's less than 24 hours since a man climbed over a fence at the airport and got onto the runway.

He's stil being questioned by police about what happened.

Meanwhile, the new terminal, T-Five which will be occupied by British Airways is massive!

The building is so big you could fit 50 football pitches over the five floors.

It cost £4 billion and six years to build, and opens to the public on the 27th of March.