The Lledo Cataloguing system by RDP Publications indicated that LP models are those with a tampo printed artwork finish. The numbering system is simple and consists of the prefix letters followed by the model type as below. The next three digits refer to the livery name. The suffix letter would signify any variation to the original livery, for example a variation in colour. The suffix letter "X" indicated that the models were delivered to the client for their completion.
LP20, the 1930 Model A Ford Stake Truck was first introduced in 1986, along with LP21 the 1928 Chevrolet Van and LP22 the 1933 Packard Town Van. LP23 the 1954 Scenicruiser, LP24 the 1934 Rolls royce Playboy Brewter, LP25 the 1925 Rolls-Royce Silver Ghost Barker followed in 1987.
1988 saw the introduction of LP27 the 1934 Mack Breakdown Truck and LP28 the 1934 Mack Canvas Back Truck. LP29 the 1942 Dodge 4x4 was not introduced until 1990.