FOUR cars and a small part of the Royal Mail sorting office in Northolt was destroyed by fire.
Four fire engines from Northolt and Southall arrived at the centre in Mandeville Road just after 7.30pm on Bonfire Night on Monday (05).
The brigade said the entire loading bay where post vans park was destroyed, along with four cars and a small part of the inside of the building.
It was under control by 8.30pm.
Royal Mail spokeswoman Morag Turnball said no-one was injured and no mail was affected by the fire.
She added: "We have temporarily relocated our delivery operation to Greenford Mail Centre whilst the structural damage to the loading bay is assessed.
"Contingency arrangements are in place to enable us to deliver the mail to our customers in the Northolt area as quickly as possible.
"The enquiry office at Northolt Delivery Office is open for customers to collect items we have tried to deliver when they weren’t at home and collections will be made as normal. We would urge anyone with information about the fire to contact the police immediately."