MIG wrote

What I also can't find on the TfL site is simple descriptions of
where
the bus routes go, as a list of places, as you get on the back of a
bus map. Is that lurking somewhere?


Paul Corfield did note that he found http://www.londonbusroutes.net was
better for some things even though a amateur site.

The information you want is there as is the equivalent street
information, eg

R68 Hampton Court - Teddington - Strawberry Vale - Twickenham -
Richmond - Kew Retail Park

Hampton Court Station - Hampton Court Way - Hampton Court Road - Church
Street - Hampton High Street - Wellington Road - Hampton Road - Broad
Street - Teddington High Street - Ferry Road - Manor Road - Twickenham
Road - Strawberry Vale - Cross Deep - King Street - Twickenham - York
Street - Richmond Road - Richmond Bridge - Hill Street - George Street
- The Quadrant - Richmond Station - Kew Road - Lower Mortlake Road -
Lower Richmond Road - South Circular Road - Mortlake Road - Besant
Drive - Kew Retail Park

--
Mike D