Do not forget to have a suitably sized receiving tray in place
With an oil catchment tray in position, use a 13mm socket or spanner to carefully remove the sump plug and fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel and refit the sump plug and washer. Do not overtighten. Replace the undertray
You may need to remove the undertray to access the sump plug
Using a 10mm socket, Phillips and Torq-30 undo the fixings. CAUTION! The undertray is heavy and should be properly supported