Figured it out!
Tried removing the handles - whilst doing that I felt a grub screw underneath the tap handle. Turn water off - turn taps on - grub screw is then accessible!
Simple once you know how :rolleyes:
I've attached a pic just in case anyone else gets stumped!
I've had a leaking Howdens kitchen tap for a few months. I've kept looking at it and wondering how I get into the unit and replace the rings. I've attached a photo in case someone knows the secret password to open this thing up! Usually you remove the decorative tap and bobs your uncle but not...