The RFU has opened this application for club members to apply directly tickets.
There are two matches in August 2019 at Twickenham v Wales and Ireland and a further match at the start of September at St. James Park v Italy.
At the end of the downloadable info sheet click on the red box at the end which will take you to the RFU ticket site. You need to register to be able to apply.
Good Luck.