A phased production restart commenced on Wednesday, with all JLR manufacturing sites, including overseas factories, expected to be fully operational by the end of next week.
The cyber attack, which occurred on 31 August, caused significant disruption and contributed to a 17.1 per cent drop in sales and a 24.2 per cent tumble in wholesales between July and September.
JLR's global manufacturing director, Luis Vara, highlighted a 'strong sense of unity and momentum' among production workers returning to their roles.
The company is providing an extended support package to suppliers, offering payments up to 120 days early, bolstered by a £1.5 billion government loan guarantee.