Owen Farrell changes tackle technique amid fear of red and yellow cards

• World Rugby has changed directives over no-arms tackles• England captain working with strength and conditioning coachThe England captain, Owen Farrell, has had to change his tackling technique amid fears of a flurry of red and yellow cards at the World Cup. Farrell was involved in two high-profile incidents where no-arms tackles went unpunished last autumn but directives from World Rugby issued at the end of last season state he should have been punished.Eddie Jones has already warned how the World Cup could be “destroyed” by inconsistent refereeing of the tackle area but England’s defence c…