There is excellent information and advice on what to work through when considering setting up a
co-operative at

Co-operatives UK

If you are at a stage to go forward to setting up a co-operative business but need professional advice on legal form, the process of registration as a legal entity or some aspect(s) of your management structure or business planning then you may qualify for free training and/or consultancy. Check this out at

Co-operative Enterprise Hub
If you need help getting to that stage one of our member Co-operative Development Bodies might be able to help MEMBERS.