Arcadia Mk3 replace with Mk4 Flush Valve & Button - Bespoke Part

The Arcadia Mk3 flush valve is no longer available and is replaced by the Mk4 flush valve which is a direct replacement and fits directly into the Blue Wave Mk1 and Mk2 and Arcadia Mk3 existing base in your cistern (i.e. the Mk4 flush will simply twist into your old base left in the cistern (from the top without any need to remove the cistern from the wall or pan).
New Flush valve  (White or Grey depending on production run) comes with a new Chrome button.