The reference letters are suppose to talk about the exact criteria that you are getting the letter for. Although it can also talk about the why you want to move to UK or how the UK will benefit from you. It will only strengthen your letter as it will be from some professional/senior person talking about how your work is going to help UK.
We have completed innovative underwater software project and we have worked with Academic consultant. He is not software developer , (but non-IT manager,related sea - marine -ship business)but know innovation business and details. I 'll get a Reference Lettter from him, it is ok or we need to find out technical IT manager? İs the reference letter would be from technical lead literally ?