One type is the open two-seater for young couples to ride in.
A two-seater, serviceable aeroplane can be bought today for about £100, or a four-seater for about £250.
Where two children to a two-seater seat is now a requirement, local education authorities have a disregard.
No two-seater taximeter cab has yet been presented for licensing.
There is no power to make the introduction of two-seater cabs dependent upon the withdrawal of an equivalent number of existing cabs.
It could be a mini-bus, a two-seater, a charabanc or anything which is propelled by an internal combustion engine.
Take a small two-seater doing the enormous distance of 18,000 miles a year.
It may well be that, in some years' time small, single-seater or two-seater hovercraft or taxi hovercraft will be crossing sea lochs or inland lochs.