Newcastle upon Tyne (/ˌnjuːkɑːsəl -/, locally /njuːˌkæsəl -/ (listen)), commonly known as Newcastle, is a city in Tyne and Wear, North East England, 103 miles (166 km) south of Edinburgh and 277 miles (446 km) north of London on the northern bank of the River Tyne, 8. 5 mi (13. 7 km) from the North Sea. Newcastle is the most populous city in the North East, and forms the core of the Tyneside conurbation, the eighth most populous urban area in the United Kingdom. Newcastle is a member of the UK Core Cities Group and is a member of the Eurocities network of European cities.