WTFF?
The Horse & Hound reports:

A horsebox towing a makeshift trailer with a combined total of five horses on board was pulled over by police, having been spotted on one of the UK’s busiest motorways.
Derbyshire Roads Policing Unit spotted the contraption on the M1 last Thursday (2 September), sharing pictures of the get-up on social media with the hashtag “#wow”.
Images appear to show a van-style horsebox towing a flatbed trailer, which had the body of another old horsebox or trailer strapped on top.
Police said there were four horses in the front vehicle and one in the rear trailer.
Officers pulled the driver over, and a safer vehicle was called to take the party on their way.
A Derbyshire police spokesman told H&H that the driver was reported for traffic offences.
Tuesday’s Horse © Fund for Horses