CAMP BASTION, Afghanistan (Reuters) - Prime Minister Gordon Brown visited his troops in Afghanistan on Saturday to counter criticism that the war effort is being undermined by a lack of equipment and personnel. Brown, who has come under fire at home for failing to lead from the front on the war, said British forces were being supplied with state-of-the-art equipment to protect them from roadside bombs, which have killed dozens in the last few months. He called for accelerated efforts to train Afghan soldiers and police so that they could take on more of the burden of battling Taliban insurgents. He said he had rammed home this point in telephone calls with President Hamid Karzai and his main rival in last week's presidential election, Abdullah Abdullah. "I've talked to Mr Karzai and Mr Abdullah and I've made it absolutely clear to them that we expect over the next year that they will train -- and we will work with them to do so -- around 50,000 more Afghan forces," Brown told reporters at Camp Bastion, Britain's main military base in Afghanistan.