Minimum tread depth for the trailer tyres?

I am going camping this summer and towing my gear in a trailer. What is the minimum tread depth for the trailer tyres?

Tyres

The Law says:

Cars, light vans and light trailers MUST have a tread depth of at least 1.6 mm across the central three-quarters of the breadth of the tread and around the entire circumference.

Tyres MUST be correctly inflated to the vehicle manufacturer’s specification for the load being carried. Always refer to the vehicle’s handbook or data. Tyres should also be free from certain cuts and other defects.

Law: Road Vehicles (Construction and Use) Regulations 1986 regulation 27

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The word MUST indicates a legal requirement. Failure to comply could result in a penalty which is usually in the form of points on the drivers license and a fine.

If a tyre bursts while you are driving, try to keep control of your vehicle. Grip the steering wheel firmly and allow the vehicle to roll to a stop at the side of the road.

If you have a flat tyre, stop as soon as it is safe to do so. Only change the tyre if you can do so without putting yourself or others at risk – otherwise call a breakdown service.