There are a number of similar companies / individuals who offer manuals for about �40 - �50 telling you how to start a courier business.
Many have been advertising these manuals on a daily basis for years.
Each will claim that you could make �250 - �450 per day.
Just like any business you start you COULD become successful, but the chances are really slim.
There's certainly no shortage of couriers in the UK. However, many of them are crying poverty because there is not enough work to go round and some of them are desperate for work and will accept jobs at very low rates.
Generally those people offering manuals for sale are making more money than many of the couriers.