Future Ship Project 21st century (FSP21)
FSP21 is a proposal to construct a replacement vessel for Her Majesty Queen Elizabeth II's yacht "HMY Britannia", retired in 1997.
It is to be funded by public subscription and will be a four masted "tall ship" but will incorporate many modern innovations and be multi-use as it will have to be self-financing.
Additionally to transporting the monarch it is to be used as a sail training ship and to promote British business interests throughout the world.
When completed it will be the largest ship of its kind in the world.
References
Future ship project 21 Wikipedia(Text) CC BY-SA