Skylon was the original intent for the design, as mentioned in the report there is a commercial variant meant for regular airtravel at near-hypersonic speeds. Until its capacity is proven for the Kazemurans/Singanese a commercial variant would be a secondary goal.
https://en.wikipedia.org/wiki/Reaction_Engines_Scimitar
https://en.wikipedia.org/wiki/Reaction_Engines_A2
https://en.wikipedia.org/wiki/Reaction_Engines_Scimitar
https://en.wikipedia.org/wiki/Reaction_Engines_A2