@Korina So sorry I missed your reply! I can't see a way on your forum to be notified of replies in a specific thread you follow or a way to get notified of direct replies. :(
Anyway, I was thinking it might be better for the request to come from your end since you'd have to be asking for the access as well at the same time? They seem really responsive and helpful. What they have available right now is:
3 hourly radar reflectivity (rainfall rate) images, in colour: available via MetWeb FTP access - contact us and ask for Open Access Rain Radar images
Let me know if don't hear from them and I can try emailing the guy I was conversing with again. Thanks!