A process for treating waste plastics material to provide at least one fuel product, the process comprising the steps of: melting the waste plastics material, pyrolysing, in a pyrolysis chamber, the molten material in an oxygen-free atmosphere with agitation to provide pyrolysis gases; bringing the pyrolysis gases from the pyrolysis chamber into a contactor having a bank of contactor elements so that some long chain gas components condense on said elements, returning said condensed long-chain material from the contactor to the pyrolysis chamber to be further pyrolysed to achieve thermal degradation, and allowing short chain gas components to exit from the contactor in gaseous form; and distilling (20, 26) said pyrolysis gases from the contactor in a distillation column to provide one or more fuel products, wherein: the condenser elements comprise a plurality of plates forming an arduous path for the pyrolysis gases in the contactor; and wherein the plates are sloped downwardly for run-off of condensed long-chain hydrocarbons, and include apertures to allow upward progression of pyrolysis gases, wherein the contactor is actively cooled by a contactor jacket and cooling fluid is directed into the jacket, in which level of condensation is controlled by control of temperature of the jacket, and wherein there is a pipe directly linking the pyrolysis chamber to the contactor, the pipe conveying upwardly-moving pyrolysis gases and downwardly-flowing long-chain liquid for thermal degradation. melting the waste plastics material, pyrolysing, in a pyrolysis chamber, the molten material in an oxygen-free atmosphere with agitation to provide pyrolysis gases; bringing the pyrolysis gases from the pyrolysis chamber into a contactor having a bank of contactor elements so that some long chain gas components condense on said elements, returning said condensed long-chain material from the contactor to the pyrolysis chamber to be further pyrolysed to achieve thermal degradation, and allowing short chain gas components to exit from the contactor in gaseous form; and distilling (20, 26) said pyrolysis gases from the contactor in a distillation column to provide one or more fuel products, wherein: the condenser elements comprise a plurality of plates forming an arduous path for the pyrolysis gases in the contactor; and wherein the plates are sloped downwardly for run-off of condensed long-chain hydrocarbons, and include apertures to allow upward progression of pyrolysis gases, wherein the contactor is actively cooled by a contactor jacket and cooling fluid is directed into the jacket, in which level of condensation is controlled by control of temperature of the jacket, and wherein there is a pipe directly linking the pyrolysis chamber to the contactor, the pipe conveying upwardly-moving pyrolysis gases and downwardly-flowing long-chain liquid for thermal degradation. the condenser elements comprise a plurality of plates forming an arduous path for the pyrolysis gases in the contactor; and wherein the plates are sloped downwardly for run-off of condensed long-chain hydrocarbons, and include apertures to allow upward progression of pyrolysis gases, wherein the contactor is actively cooled by a contactor jacket and cooling fluid is directed into the jacket, in which level of condensation is controlled by control of temperature of the jacket, and wherein there is a pipe directly linking the pyrolysis chamber to the contactor, the pipe conveying upwardly-moving pyrolysis gases and downwardly-flowing long-chain liquid for thermal degradation.