Thanks, there are in fact 10 'Sights of London', although produced in two sets (4 and 6). Date about 1970, I believe, but I'm still following this up.
Union Flag
Businessman
Scottish Piper
Underground
Horse Guard
Coldstream Guard
Chelsea Pensioner
Policeman
Bus
Beefeater
There is mention on my site, but it is squirreled away a little:
Fiestaware > Patterns > Seriesware