Bill Sweeney says it is "key" for fans to be allowed into Twickenham to watch England later this year for financial reasons.
Luke Thompson and Oliver Gildart will not be available to aid Great Britain Lions as they look to improve on a losing start to their tour.
A first Test appearance in 12 years for Great Britain Lions ended in a 14-6 defeat to a Tonga Invitational XIII in New Zealand on Saturday.
Agen hooker Paula Ngauamo is set to miss seven weeks for his Top 14 club following an incident during the Rugby World Cup.
Siale Piutau said he could not have wished for a better 34th birthday after he ended his international career with a World Cup win.
With both teams already eliminated, Tonga bowed out on a winning note by scoring four tries to USA's three in Higashiosaka on Sunday.
If the weather holds up in Osaka, Siale Piutau will hope to celebrate his birthday with a record-breaking appearance for Tonga against USA.
Victory over Tonga sealed France's place in the Rugby World Cup quarter-finals, but Jacques Brunel's men were far from impressive.
Jacques Brunel has stuck with his rotation policy for France's match against Tonga - a fixture that produced a huge World Cup shock in 2011.
Jacques Brunel has tinkered with his half-back pairing again for the match against Tonga, Baptiste Serin and Romain Ntamack starting.