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Thanks for all the supportive responses. Sorry for not replying last night. It was a busy day and I actually managed to get to bed at a reasonable time.
Svejk: I've had support from organisations in the past and it's very rewarding to give my time back to a charity such as this one.
The charity doesn't just set out to help street drinkers, it's there to help anyone that is homeless or in need of help in the Sheffield area.
Pixie: On a Monday and Tuesday they send out teams of volunteers to known areas. Food, drink (obviously non alcoholic), clothing and are there to offer support. Thursdays and Fridays they have a temporary premises where they provide hot meals to the homeless. They are trying to get permanent location so that they can expand and offer more support. With the help of more volunteers they will be able to do this.