"Starting with rehousing the victims, and making sure they don't leave the W11 post code. And remain on the emergency housing list.
"Monday I will be around @RugbyPortobello putting this plan into action. From 10:30am until progress has been made."
Mr Cundy said on Saturday that of the 58 people, 30 were confirmed dead while16 bodies had been recovered from the 120-flat Tower and taken to a mortuary.
Bertrand, who won his 14th England cap in Tuesday's 3-2 defeat, signed a new five-year contract with Southampton last summer after joining from Chelsea in a £10million deal in 2015 after an initial loan spell.