Voyages of Discovery have single cabin.
Most Fred Olsen ships have single cabin.
Cunard have single cabins on all there ship.
Qe2 has single cabin.
The only company I know of are Island cruises, the others just have the single supplements.
Most of the Older ships that were originaly passenger ships have them,but the new "unit" built ones do't have them has they are not considered "cost effective"...I don't know if this will get past moderater here,but being has this site does not have a Singles section,it should be alright,Try Gills website whichs has a "Solos" page,get some good deals there...Cheers..Mat.
Buxey, Gosport, is having you on. QE2 has single cabins but has been sold and sadly will no longer be sailing. Fred Olsen and P & O have singles, as do Saga Rose and Saga Pearl for the over 50s. Almost all companies will sell a double for single occupancy from the extortionate 200% down to 40%. You need lots of brochures and hunt on sites like cruise.c.
The COSTA Allegra has single cabins. One of them is Number 5012 - "THE CABIN FROM HELL" - do NOT accept this cabin. It is small and very,very noisy from the sea as well as the crew.
The thomson celebration and destiny have single cabin.