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What are LST Trailers?

What are LST’s (Longer Semi-Trailers)?

LST is short for “Longer Semi-Trailer”. These are  a familiar sight on UK roads since the initial trial in 2012, under strict Department for Transport guidelines. On May 31st 2023, legislation came into effect within Great Britain to allow LST’s on the roads as a special type under Statutory Instrument 2023/524 – The Road Vehicles (Authorisation of Special Types) (General) (Amendment) Order 2023. This amended -The Road Vehicles (Authorisation of Special Types) (General) Order 2003.

How much longer is the LST trailer? 

Up to 2.05m longer! 

That’s right, the LST can be up to 2.05m longer than a standard 13.6m trailer. This takes the total length of the LST to 15.65m.

Montracon LST Trailer

Operators Responsibilities…

Operation requirements for LST trailers that were mandatory during trial phase have now been modified, giving clear guidance for operators to adhere to when operating this type of trailer.

To learn more about your responsibilities for operating LST trailers click here:

https://www.gov.uk/government/publications/longer-semi-trailer-lst-implementation-guide-for-operators/longer-semi-trailers-full-implementation-guide-for-operators

You can also read the Statutory Instrument legislation here:

https://www.legislation.gov.uk/uksi/2023/524/contents/made

LST Curtainsider

Why use LST trailers?

By increasing the length of the trailer by up to 2.05m, allows you to increase your payload by an extra 4 pallets, or 9 more cages with each consignment. This equates to 15% extra capacity per full load! A fully loaded Longer Semi-Trailer “LST” also reduces the number of required journeys, overall emissions, congestion & collision risk.

Longer Semi Trailers > Less Trucks > Less Fuel > Less Maintenance.

Cheaper long-term operations.

What is an LST trailer

Increasing Demand

Since the introduction of legislation allowing LST trailers on GB roads, Montracon is experiencing increased demand from operators due to the benefits LST’s bring.

Montracon’s extensive experience in providing LST trailers to the industry during the decade long trial means it is now well positioned to offer various specifications and can accommodate customers’ requirements.

Longer Semi Trailer

What LST’s do Montracon offer?

LST Curtainsider

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LST Box Van

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Extender Flat

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"We have only ever bought new trailers from Montracon, we have always found that the product exceeds our expectations."
“Genuine people behind the product - they are a credibility to the business. Will only ever use Montracon trailers.”
“As I have 13 Montracon trailers out of a total of 19 trailers, the numbers state the continuous satisfaction with the product.”
“Thank you - superb service. Our sales contact was in contact from start to finish and checking on our requirements at all times of day and night. The completed trailer is 100% as we required, first class. Credit to Montracon.”
“Fantastic trailers, fantastic marketing, fantastic service, fantastic support. I came to Montracon due to their ongoing, incredible promotion of their products. It is safe to say, the quality backs it all up. I have 3 Montracon trailers now!”
“The two trailers we bought are of excellent quality and we are happy with our purchases. The attention to detail from your sales manager was exemplary. We will be returning to Montracon in the future.”
“Very good, efficient, and prompt in my limited experience. It was my first purchase from Montracon and everything went very well. Thank you.”
“Lloyd Walsh, our Area Sales Manager, is very easy to deal with and understands our needs. Trailers were completed within the given time frames. Thank you to all the team at Montracon.”
“They are what they say on the tin - Quality, Strength & Longevity. Montracon trailers last the longest out of all my fleet - worth the extra you pay. Great manufacturing!”
“The Montracon team can not do enough to help. Real people - friendly, open, and passionate about what they do. Worth every penny - their trailers are all fully maufactured in the UK.”
“This was our first order from Montracon and this was mainly due to the fact that Bob kept in touch with us over the last few years even though we were buying from SDC, the service from Bob was excellent and nothing was too much trouble. The service after the order was placed was again very good and excellent communication throughout.”
“I am over the moon with our new trailer. It’s working great and the rear steer feature is worth every penny. I’d like to say a big thank you to everyone at Montracon. The sales and engineering team worked with me to make sure the specification met my requirements.”
“I’m extremely happy with the quality of the Curtainsiders that we receive from Montracon. Not only are the trailers of the highest quality, but the level of service really makes a difference as well. It’s fair to say that the quality that Montracon provide really does fit in with their core brand values.”

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14th April 2026 No Comments