The reality of course is very different and is typical of how The Herald (and other ‘local’ news papers work these days in that they take a story from anywhere in the country and try to apply a local slant to it. In this case its a publicity stunt in London by Match.com.
Its not mentioned anywhere on Match.coms own page but apparently according to The Herald
If the 'Datemaster' bus proves a hit during its one-week trial in London, the service will then be rolled out to other cities across the country – with Plymouth a possible destination.
So a publicity stunt by a singles matching agency could go to other cities, and Plymouth is indeed ‘another city’ hence the local slant!
Quite why the story is illustrated by a Citybus Dart who knows?
(Actually its more likely a case of “quick find some picture of a bus on the internet - anything will do” )