The Russia-Ukraine conflict could last a “number of years” and the world needs to be prepared for Moscow “to seek to use even worse weapons”, British Foreign Secretary Liz Truss warned Sunday. “I fear this will be a long haul, this could be a number of years,” Truss told Sky News. “Russia have strong forces and we know the Ukrainians are brave, they are determined to stand up for their sovereignty and territorial integrity and they are determined to fight,” she said. The minister said that intelligence showed that Ukrainian forces were “continuing to resist Russian advances” and that there had…