Towing a header trolley with a 50kph (31mph) tractor at 30kph (19mph) or 40kph (25mph) is not technically permitted unless a speed limiter is fitted to stop it going quicker.

Retail prices start at £6,200 for the standard Profi trailer for a 6.7m header, with lights, over-run brakes, adjustable supports and front turntable.