Before this page was changed to List urban areas of the UK from List of conurbations of the UK and thus excluding the Liverpool Manchester Conurbation. There are plenty of sources out there referencing to a Liverpool Manchester conurbation samples found  from the University of Manchester here: https://www.escholar.manchester.ac.uk/uk-ac-man-scw:89997, and in this book here: Liverpool-Manchester conurbation and in this book on Metropolitan Governence and Spatial Planning here: Liverpool-Manchester conurbation and this book here: Liverpool-Manchester conurbation and from Invest in Sefton here: http://www.investsefton.com/investment/lifestyle/ and here liverpool-manchester conurbation jointly have a combined population of 5.56 million as the article was changed they don't fit current criteria and to previous editors who are not happy with those sticking to there guns in keeping the two cities separated Look at "conurbation which is a region comprising a number of cities, large towns, and other urban areas that, through population growth and physical expansion, have merged to form one continuous urban and industrially developed area" example of one link there are others via Warrington where Greater Manchester links directly with Liverpool continuously starting from Manchester city centre-Salford-SwintonWalkden-Worsley-Astley-Tyldesley-Atherton-Leigh-Golborne-Ashton in Makerfield-Haydock-St Helens-Prescot-Huyton-Broadgreen-Wavertree-Edge Hill-Liverpool City Centre. Which according to Merriam-Webster's Dictionary's definition of a conurbation " a large area consisting of cities or towns that have grown so that there is very little room between them" the urban link I have shown has no room between them consider a seperate UK article based on the original conurbation article.