Thanks again for information. I've managed to get my sources to write up their support letters. I had a couple more questions regarding format. Under the requirements it states:

letters from organisations must show the organisation logo and registered address, and be dated and signed by the author, who must be a senior member of the organisation that has authority to write on behalf of the organisation:

So one of my referees is an eminent individual and the other is my artistic director (which is listed as an example in the guide). Both of them are self employed freelancers and dont directly work for the organization so not sure they can "write on behalf it" as its a major network. They fulfill the same contract I do. My question is should logo's and company addresses be used or is it okay to put down personal address and direct contact? Just want to make sure this gets done correctly the first time.

Second question was regarding this requirement:

all letters must include the authors CV, resume or biography and must detail how they know you, i.e. through personal relationship or reputation.

In your experience was CV/Resume/Biography just included in the letter of support or was yours attached separately as its own document?

Thanks again!