UK High Court Tesco's Clubcard Logo Infringes Lidl's Trademark
UK High Court Lidl Great Britain v Tesco Stores Tescos use of yellow and blue Tesco Clubcard logos infringed Lidls trade marks, due to Tesco use of a yellow circle blue square Tesco Clubcard Logo sufficiently similar to Lidls logo mark similarities not remedied by using wording with the logo
Source: natlawreview.com