Then give up the iron duke and turn the Tiger into her role.
That won't allow you to do what you want to do with Tiger either.
**************************************************************************************************************
The Relevant Section of the First London Naval Treaty
Article 2
(b) Of the ships to be disposed of under this Article, the following may be retained for training purposes:
by the United States:
"Arkansas" or "Wyoming".
by the United Kingdom:
"Iron Duke".
by Japan:
"Hiyei".
These ships shall be reduced to the condition prescribed in Section V of Annex II to Part II of the present Treaty. The work of reducing these vessels to the required condition shall begin, in the case of the United States and the United Kingdom within twelve months, and in the case of Japan within eighteen months from the coming into force of the present Treaty; the work shall be completed within six months of the expiration of the abovementioned periods.
**************************************************************************************************************
In English that meant the conversion of Iron Duke had to begin 12 months after the Treaty came into force and be completed 18 months after the Treaty came into force. As the Treaty was signed on 22nd April 1930 this meant from 22nd April 1931 to 22nd October 1931. It had to be done to the following standards.
**************************************************************************************************************
Section V
Vessels retained for training purposes
(a) In addition to the rights already possessed by any High Contracting Party under the Washington Treaty, each High Contracting Party is permitted to retain for training purposes exclusively the following vessels:
United States: 1 capital ship ("Arkansas" or "Wyoming");
France: 2 surface vessels, one of which may exceed 3,000 tons (3,048 metric tons) standard displacement;
United Kingdom: 1 capital ship ("Iron Duke");
Italy: 2 surface vessels, one of which may exceed 3,000 tons (3,048 metric tons) standard displacement;
Japan: 1 capital ship ("Hiyei") 3 cruisers ("Kuma" class).
(b) Vessels retained for training purposes under the provisions of paragraph (a) shall, within six months of the date on which they are required to be disposed of, be dealt with as follows:
1. Capital ships
The following is to be carried out:
(1) Removal of main armament guns, revolving parts of all barbettes and turrets; machinery for operating turrets; but three turrets with their armament may be retained in each ship;
(2) Removal of all ammunition and explosives in excess of the quantity required for target practice training for the guns remaining on board;
(3) Removal of conning tower and the side armour belt between the foremost and aftermost barbettes;
(4) Removal or mutilation of all torpedo tubes;
(5) Removal or mutilation on board of all boilers in excess of the number required for a maximum speed of eighteen knots.
2. Other surface vessels retained by France, Italy and Japan
The following is to be carried out:
(1) Removal of one half of the guns, but four guns of main calibre may be retained on each vessel;
(2) Removal of all torpedo tubes;
(3) Removal of all aviation facilities and accessories;
(4) Removal of one half of the boilers.
(c) The High Contracting Party concerned undertakes that vessels retained in accordance with the provisions of this Section shall not be used for any combatant purpose.