By Andrew MacAskill LONDON (Reuters) -Britain aims to send a first group of asylum seekers to Rwanda in two weeks’ time as part of a policy which the government says is designed to break people-smuggling networks and stem the flow of migrants across the Channel. In April, Prime Minister Boris Johnson’s government announced plans to send some of the people who seek asylum in Britain to Rwanda in a plan that drew criticism from both within and outside Johnson’s Conservative Party as well as from many charities. The Home Office said on Tuesday that an initial group of migrants have started to rec…