Miniaturisation test UK

[Harris]

Hello been on Propecia 9 months, I have my hair very short (1 grade) so it is very hard to tell whether my hair is continuing to miniaturize. some days I think it looks ok then others it look worse than ever driving me insane!! I need to get an official opinion on whether this is working for me or not. I live in UK and cant find any clinics that offer this service any suggestions/ contact details please
? thanks