Also following this, I see you can create custom user role names (Admin, Moderator etc). Is there a way for this to display under the username on the forum posts? Currently it has username then member underneath, we would like to have some customisable names, also would there be a way of adding badges (small images) to the section under the user as well? 

Hi Progdog

Is there  a guide somewhere to change the colours? I am having to change a colour and then refresh the forum to see what it changed, it just has a list of numbers with hash colour codes but nowhere to say what element they apply to.

Not yet.

Also following this, I see you can create custom user role names (Admin, Moderator etc). Is there a way for this to display under the username on the forum posts? Currently it has username then member underneath, we would like to have some customisable names, also would there be a way of adding badges (small images) to the section under the user as well?

Not yet, currently you can only change icons in members reputation settings ( Settings > Members Tab ). You can find all icons here: http://fontawesome.io/icons/

Ok is there some sort of custom CSS I can put in to make the permission show under the name on the left. For instance you have Robert - Support - Reputation. I want to have Robert - Admin - Support - Reputation. With the 'Admin' being the user group name 'Admin, Customer, Guest' etc. Or even the access name 'No access, Moderator etc. 

Point is, we want to have Admins displayed as Admins without being tied to the reputation system, reputation is only based on post amounts. There is no way to display hierarchy. 

Any ideas? 

There is not such a way, CSS is only for style, you can't use CSS for displaying new data. I'd recommend disable Reputation Titles for Admins, just navigate to wpForo Settings > Members, scroll down and uncheck Reputation Titles for Admin usergroup. This will allow you to display custom title, the custom title can be set on front-end in My Profile > Account page.