Tony Blair announced on Sunday that Britain would come close to doubling development aid to Pakistan over the next three years, focusing increased expenditure on ensuring that Islamic schools, or madrassah, do not come under the influence of extremists.

In a declaration issued at the end of a bilateral summit in Lahore, the British prime minister joined President Pervez Musharraf of Pakistan in spelling out a broad strategy to “counter terrorism and extremism in all its forms and manifestations”.