Skylon
For many decades this has been the dream of Alan Bond.
In July 2013 the design has passed an European Space Agency(ESA) appraisal that it will work and there are no "Show stoppers", this led to an injection of £60m($100m) by the UK government to support the Sabre Engine Development.
In April 2015 SABRE passed a U.S. Air Force feasibility test.
Flights were meant to take place as early as 2018. (more likely a SABRE test engine and first flight 2022/23) NOW put on hold maybe 2026.
Revolutionary new way for access to space (single stage to orbit)
Skylon Spaceplane - Payload of 15 tons and an ability to service "space nodes"
Human trips to the ISS
Skylon ISS docking
PERSONNEL /LOGISTICS MODULE (SPLM) can carry 30 passengers
Orbital Infrastructure
SKYLON launching elements to in-orbit infrastructures such as modules for future space stations and spacecraft assembly platforms.
Also for space telescopes, for planetary missions and for large satellites.
Outer shell made from 10m2 panels, covered with a skin of aluminised Mylar. The structure provides tank farms for liquid oxygen and hydrogen propellants, accommodation for construction crews, and fuel cells to provide the base load power.
In-Orbit assembly complex
Orbital Base Station design for orbital assembly complex in low Earth orbit, functioning as an integral part of a space transportation system and enabling the construction and maintenance of vehicles for the exploration of the Moon and Mars.
Hypersonic travel
Based on Reaction Engines SABER engine has been shown much interest especially from DARPA for hypersonic fighter designs. Meanwhile Reaction Engines has looked into commercial point to point transportation based on its LAPCAT A2 design, that Boeing has made an investment in.