The Guardian published extracts from a slideshow presentation produced for the H5 Private Healthcare Alliance, which stated that people believe the NHS provides good healthcare, though they believe it was "too bureaucratic with long waiting lists".
Crosby Textor advised its client that 63% of those questioned in a poll conducted for the presentation believed that "going private frees up the NHS waiting list".
The paper said the presentation was made by Crosby Textor, known as CTF Partners in Britain, towards the end of 2010, just months before the Health and Social Care Bill was given its second reading in the House of Commons in January 2011.
More top news
The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.