Trades Job Completed Note
After many attempts to machine the inside of the basin breach we got it down as far as the breach could allow
There is still a slight uneven section on the seat but cannot be machined any more.
Supplied and Installed a special seating washer to take up the unevenness of the breach seat and is working ok at the moment.
Leak has stopped and working well (if re occurs, would be wise to replace basin set)