The 2001 Humber Refinery explosion occurred in the parish that has a population of what, as of 2011?
South Killingholme South Killingholme is a village and civil parish in North Lincolnshire, England. The population of the civil parish at the 2011 census was 1,108.
Upholland Upholland is a civil parish and village in West Lancashire, England, 3 miles east of Skelmersdale and 4 miles west of Wigan. The population at the 2011 census was 7,376.