Campaigners in Wales are celebrating as legislation to phase out brightly coloured and slickly designed tobacco packaging in the UK takes effect tomorrow (Friday). All tobacco products must now be produced in plain, standardised packs with large picture health warnings. Shops and retailers have 12 months to sell existing packets. Cancer Research UK began campaigning for plain, standardised packaging in April 2012 and more than 90,000 people from across the UK took action to support the campaign. The Welsh Assembly…