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Hello, I'm Susan Hume and this is the Today in Parliament podcast for Monday the 24th of March.

Coming up, there is concern in the Commons that the electrical fire which temporarily shut down Heathrow

may have exposed a dangerous weakness to

malicious actors who will undoubtedly have taken note of this weekend's events.

Also, the government gets the ball rolling on its landmark planning reform.

Make no mistake, this bill will transform the lives of working people and Britain's prospects for years to come.

And peers try to soften the blow of the rise in employers' national insurance.

Not exempting hospices from this tax is shockingly cruel.

But first, MPs have raised concerns that the electricity substation fire, which brought Heathrow Airport to a standstill, has revealed a weakness in the system that terrorists and others could try to exploit in the future.

The fire on Friday led to an 18-hour closure of Europe's busiest airport, canceling 1,300 flights and disrupting 200,000 passengers.

In a common statement, the Transport Secretary Heidi Alexander said Heathrow had the energy

requirements of a small city. She said the fire was exceptional and had taken out the whole substation,

but it was not the only electricity supply point for the airport.

The other supply points continued supplying to Heathrow Airport throughout the incident.

Heathrow's view was that this supply was insufficient

to ensure the safe and secure ongoing operation of all systems across the whole airport.

She explained that to use the other two supplies across the entire airport,

all the systems had to be switched off, powered up again and checked.

As for backup supplies,

the airport has a range of backup generators and

...