Pret a Manger’s charitable foundation is to invest in a homeless hostel in London as part of a project to provide jobs and training for people who once lived on the street. The Pret Foundation is funded by the sale of some products and customer donations and will invest more than £200,000 a year. The project will be run in conjunction with the Methodist church’s West London Mission in Kennington, south London. Rooms for 13 people at the mission’s existing…