Question: Which places are connected by motorway from who's 19th Junction the M6 motorway runs from?
Context: The Thelwall Viaduct (grid reference [ SJ664883] ) is a steel composite girder viaduct in Lymm, Warrington, England.  It carries the M6 motorway across the Manchester Ship Canal and the River Mersey.  Its location on the motorway network is between junctions 20 and 21 of the M6, the former being also known as junction 9 of the M56. The M6 motorway runs from junction 19 of the M1 at the Catthorpe Interchange, near Rugby via Birmingham then heads north, passing Stoke-on-Trent, Liverpool, Manchester, Preston, Lancaster, Carlisle and terminating at the Gretna junction (J45).  Here, just short of the Scottish border it becomes the A74(M) which continues to Glasgow as the M74. The M42 motorway is a major road in England.  The motorway runs north east from Bromsgrove in Worcestershire to just south west of Ashby-de-la-Zouch in Leicestershire, passing Redditch, Solihull, the National Exhibition Centre (NEC) and Tamworth on the way.  The section between the M40 and junction 4 of the M6 forms – though unsigned as such – a part of Euroroute E05.  Beyond junction 11 the route is continued as the A42, the junctions on this section, 12–14, are numbered like a continuation of the motorway, but the road has non-motorway status from here. Corley (and the associated hamlets of Corley Ash and Corley Moor) is a village and civil parish in the North Warwickshire district of Warwickshire, England.  The population at the 2011 census was 668.  It is located about 8 km northwest of Coventry and is adjacent to the village of Fillongley.  The M6 motorway runs close by, and the village is familiar to motorists as it is the site of Corley Services.  Other significant buildings in the area include Corley Hall, which was built in the 16th century. The M6 motorway (Irish: "Mótarbhealach M6" ) is a motorway in Ireland, which runs (together with the M4) from Dublin to Galway.  The M6 extends from its junction with the M4 at Kinnegad all the way west to the outskirts of Galway City, but the Athlone bypass and the approach to Galway city - while of dual carriageway standard - have not been designated motorway and are still signed as N6.  The motorway was officially completed and opened to traffic on 18 December 2009, and was the first city-to-city direct major inter-urban route to be completed in Ireland.  The M6 and M4, which form the Galway-Dublin route, consist of a grade-separated 2+2 dual carriageway road with a top speed limit of 120 km/h.  At approximately 144 km (90 mi), the M6 is the third longest motorway in the state. The M23 is a motorway in the United Kingdom.  The motorway runs from south of Hooley in Surrey, where it splits from the A23, to Pease Pottage, south of Crawley in West Sussex where it rejoins the A23.  The northern end of the motorway starts at junction 7 on what is effectively a 2 mi spur north from junction 7 of the M25 motorway (junction 8 on the M23).  From Hooley it runs for 17 mi past Redhill, Gatwick Airport and Crawley.  A spur runs from junction 9 to Gatwick Airport. The N62 road is a national secondary road in Ireland.  It links the M6 motorway east of Athlone, County Westmeath with junction 6 of the M8 motorway at Kilnoe near Horse and Jockey in County Tipperary, 96.625 km to the south (map).  The route also forms a junction with the M7 motorway south of Roscrea. The Preston By-pass was Britain's first motorway.  It was designed and engineered by Lancashire County Council surveyor James Drake as part of a larger initiative to create a north-south motorway network that would later form part of the M6 motorway.  The by-pass was opened on 5 December 1958 by the Prime Minister, Harold Macmillan.  Nearly £3 million was spent in its construction.  The original 8 ⁄ -mile (8.26 mi ) motorway ran around the east side of Preston between Bamber Bridge (now the M6, Junction 29) and Broughton (now the M55, Junction 1) and crosses over the River Ribble at Salmesbury at the M6 Junction 31. The N6 road is a national primary road in Ireland from junction 11 on the M4 motorway at Kinnegad to Galway city.  The N6 and N4 form a continuous motorway or dual carriageway from Dublin city centre to Galway City passing in an east–west direction through the midlands of Ireland.  Most of the road is motorway standard (designated as M6 motorway) with the exception of the Athlone bypass and stretches of urban road in Galway City, which are the only sections of the road that remain designated as N6 dual carriageway.  There is one toll on the road outside Galway city.  Major upgrades to the road were completed in December 2009 completing the first intercity motorway/dual carriageway in Ireland. The M1 is a south-north motorway in England connecting London to Leeds, where it joins the A1(M) near Aberford.  It was the first inter-urban motorway to be completed in the UK; the first road to be built to motorway standard in the country was the Preston By-pass, which later became part of the M6.
Answer: London to Leeds