it was todo with their link/care for the working class (generally doing manual labour etc in industrial britain) they appeal to this "lower" class and thus took on the name Labour.
Labor resources - resources of available manpower. Human effort used in production. That means technical expertise and marketing expertise, too. The payment for labor is a wage.
Labour can be anyone who is being forced to work or where a woman goes into labour (has a baby) or the party Labour. Child labour is where a child is being ilegally forced to work.