What has had an influence upon the accent / dialect?

• The Newcastle 'Geordie' accent has been influenced by the invasion of the Anglo-Saxons in the 5th century.
  
• The influence of the Anglo-Saxons is clear as poems from the 5th century translates more successfully in Geordie than into modern day English.
  http://www.englandsnortheast.co.uk/GeordieOrigins.html
  
  
• Distinctively Geordie and Northumbrian words are more than 80 % Angle in origin, compared to standard English, where the figure is less than 30 %. Modern English words by comparison are predominantly of Latin origin because modern English derives from the dialects of southern England which were continuously influenced by the Latin and Norman French favoured by the educated classes of Oxford, Cambridge and London. 
  
• Sometimes a Geordie may appear to be using words incorrectly , but this may not always be the case. For example a Geordie may say Aaal Larn yer (meaning I'll teach you) as in the Anglo Saxon Laeran which meant teach. Other Geordie words of Anglo Saxon origin include Axe (ask) from the Anglo-Saxon Acsian, Burn meaning stream, Hoppings meaning fayre and Gan which is the Geordie and Anglo saxon word meaning to go.