The baby was born in the back of a car at the scene of the huge blaze.
According to the fire brigade, they had been stuck in traffic and the mother-to-be was already in the late stages of labour in the back seat of the vehicle.
McLaren, who has been a firefighter for 15 years, leapt into action and with colleague Richie Hall began to help.
The husband was driving and was in a bit of a panic. I could see that the lady in the back seat was in the middle of giving birth and when I looked I could see the baby's head.
We began to give the mum oxygen and to try and reassure her. While Richie carried on doing that I ran round to where the baby was and kept telling the lady to push.
Once he was born we rubbed him down to get his circulation going and when he started crying I knew it was going to be alright. We then kept mum and baby warm until London Ambulance Service arrived to take them to hospital.
