- Reading Borough Council http://www.reading.gov.uk
- Reading tourism http://www.readingtourism.org.uk
- Richmond Riverside http://www.totheriver.co.uk/index.htm
- River and Rowing Museum at Henley http://www.rrm.co.uk
- River Thames Guide http://www.riverthames.co.uk/
- River Thames Society http://www.riverthamessociety.org.uk
- River Thames Walk & Cycle Guide http://www.the-river-thames.org.uk/
- Royal Borough of Windsor & Maidenhead http://www.rbwm.gov.uk
- RSPB http://www.rspb.co.uk/
- Runnymede tourism http://www.runnymede.gov.uk/front/tourism_contents.htm