This from another forum, the RFI for the T31E I'd now out and makes some interesting reading. Re my previous comments on Lloyds Naval Rules it seems variations are allowed in certain areas, also the term FTR - Fitted to Receive seems prominent and I guess this replaces the old FFBNW - fitted for but not with. It does give the timescale and asks for all ships to be completed by 2023 so it seems that equipment fro T23 won't be available.
For those who like a 57mm gun, this is the ship for you.
It certainly seems that it will be austere which is fine when there are adequate first class escorts but...... . .