Hi :)
Unlike everyone else who didn't read your description, I am based in the UK and have an account set up and ready to go.
My company focuses on usability testing for all types of software, including mobile apps. I will also leave an honest, 5* review in the UK app store for you too at no extra cost :)
Please let me know if you require anymore info. I look forward to hearing from you.
Kind regards,
Tom Griffiths
Griffiths Technology Services