Abstract: This invention relates to wheeled vehicles and particularly to motorised road vehicles. The wheeled vehicle (10) includes two frames (12) for carrying road wheals (18, 20), the frames (12) being laterally spaced apart. A pair of road wheels (18, 20) are mounted on each frame (12) for supporting that frame (12) on the ground, the wheels (18, 20) of each pair being mounted for rotation about operatively more or less horizontal rotational axes which are spaced apart along the associated frame (12). A motor (36) is connected by a drive train (48, 28, 30, 32) to a rear wheel (20) on each of the wheeled frames (12). The wheeled frames (12) are connected together for synchronous tilting relative to the vertical, so that the camber angles of all the wheels (18, 20) change in response to lateral tilting of the frames (12).

Abstract: The invention relates to a method of inserting items of mail (22) into envelopes (24), the method including an insertion cycle comprising the steps of: circulating, in succession, a series of insertion stations (12) past at least one envelope feeder (16), past at least one mail feeder (18) and past a delivery point (20); feeding an item of mail (22) and an associated envelope (24) on to each station (12) as the station (12) passes the respective feeders (16,18); inserting each item of mail (22) into the associated envelope (24) while the associated station (12) moves towards the delivery point (20); and delivering each envelope (24) with its inserted item of mail (22) from the associated station (12) to the delivery point (20). Each station (12) is then recirculated past the feeders (16,18) and past the delivery point (20), to repeat the cycle. The invention extends to an apparatus (10) for performing this method.