Strength of the UK’s Armed Forces

I need to clarify the difference between what the rangers will do and what our Royal Marines do, because the Royal Marines are concerned that they are being put out of a job. Everything that my hon. Friend has just described could be done by the Royal Marines. Let us take an example in Mozambique. Were we to put this rangers brigade in, who would replace them after five or six months? Where is the endurance capability that our armed forces need to provide?