Trailer Winch on a Flat Bed

We enjoy bespoke work :-)
After listening to the requirements of our customer, the design team came up with these modifications to a flatbed trailer.
A 'letterbox' was cut out of the back panel of the trailer and a mounting platform was fabricated for the 3,500Ib pulling winch to bolt down onto.
The winch is a COMEUP DV3500i which pulls just over 1.5T
An Emergency Stop was installed by the winch for compliance with the Machinery Directive.