Shops cut back US retail event to avoid deliveries overload and confusion . Discounts supposed to kick-off this year proved disaster in the UK . Scenes of violence and disappointment marred Britain 's Black Friday . Rush to order reduced merchandise online created huge delivery backlog . Expectations must be managed and crowds tamed for success Christmas .
Shops cut back US retail event to avoid deliveries overload and confusion . Discounts supposed to kick-off Christmas proved disaster in the UK . Scenes of violence and disappointment marred Britain 's Black Friday . Rush to order reduced merchandise online created huge delivery backlog . Expectations must be managed and crowds tamed for success this year .