I’ve been researching footmen for my project, there is surprisingly little that I can find. The one relevant book in the library seems to have disappeared without a trace. So I have looked into films about the times as well. The footman uniforms were always fairly old fashioned, and there does not seem to be that much variation past colour, so I’m sure making a plausible design will not be too difficult.
Houses tended to have their own colours so i have been trying to find out the colour Wollaton house used, no luck so far though.