Where can I get a step by step guide to writing a constitution for a sports group?

I'm working with a very new community group on an environmental project which needs to secure some grant aid. Many of the funding sources I've looked at require that applicants be somehow formalised and constituted.

The group has adopted a very simple set of rules, but it doesn’t have a bank account and I’m not sure what status it has legally, if any. It’s really just a group of enthusiasts.

The simplest and most quickly achievable way to get formalised appears to be to set up as an unincorporated association. Is this correct? and if so, what is involved in establishing an unincorporated association?

Alternatively, could the existing Community Association, which is a registered charity, apply for grants on behalf of this group and receive the funds?

I have been trying to find out the answer to this question. I sit on a board of directors of a company that is limited by guarantee. At our last board meeting our treasurer resigned. The question is : As our accounts are done by an external accountant, do we have to appoint a new treasurer? Is it a legal requirement that we must have one ?

I am working with a membership charity undergoing major reorganisation. Part of this is to update the constitution. I have two questions:

We have had trustees stand down recently and the constitution only provides for electing trustees from the membership at the AGM

We need to bring on new skills and expertise from outside but there is no provision for this.

How do I get this sorted quickly in the short term? And in the long term how does one update the constitution [in this case we probably need to start from scratch]?

A small local registered charity are finding it difficult to appoint honorary officers. Their constitution says they should have Chair, Sec and Treasurer but also that it will not be invalidated by vacancies in number or failure to appoint. Seemingly they have adequate trustees. Their AGM is approaching. Can they operate without Honorary Officers by just appointing someone to chair individual meetings and another to take minutes?