For those insisting union is a toffs' game it might be worth looking at this link. It's from 2007 and it wasn't true even then. You only have to look at the numbers of players who have switched from League to Union (and some the other way) to give the lie to this.
The England World Cup squad and where they went to school:
Jamie George Haileybury and Imperial Service College - an independent school near Hertford, England. Originally a boys' public school, it is now co-educational, enrolling pupils at 11+, 13+ and 16+ stages of education. Over 750 pupils attend Haileybury, of whom more than 500 board.
Rob Webber Pocklington School - an independent school in Pocklington, East Riding of Yorkshire, England. It was founded in 1514 by John Dolman.
Tom Youngs Gresham’s School - an independent coeducational boarding school in Holt in North Norfolk, England. Gresham's School is one of the top 20 IB schools in England
Kieran Brookes Kirkham Grammar School - a selective, co-educational independent school in Kirkham, Lancashire, England. It was founded in 1549.
Dan Cole Robert Smyth Academy - an upper school in Market Harborough, Leicestershire, England for 14-19 year olds.
Joe Marler Heathfield Community College - a secondary school and sixth form located just outside the market town of Heathfield in the heart of the Wealden district of East Sussex in the U.K.
Mako Vunipola Millfield - a co-educational independent public school in Street, Somerset, England.
David Wilson Harton Technology College (formerly Harton Comprehensive School) - a mixed secondary school and sixth form in South Shields, Tyne and Wear, England, with pupils aged from 11–18
George Kruis St John’s School, Leatherhead - an independent school in Surrey, England. It is a co-educational independent school for approximately 660 pupils pupils aged 13 to 18.
Joe Launchbury Christ's Hospital, also called The Bluecoat School, Housey and CH - an English coeducational independent day and boarding school with Royal Charter located in the Sussex countryside
Courtney Lawes Northampton School for Boys (NSB) - a secondary school (academy) in Northampton, England
Geoff Parling Durham School - an independent day and boarding school in the North East of England for boys and girls
James Haskell Wellington College - a British co-educational boarding and day independent school in the village of Crowthorne in Berkshire.
Chris Robshaw Millfield - a co-educational independent public school
Tom Wood Woodlands Academy (formerly The Woodlands School and Sports College) - a boys secondary school with academy status situated in west Coventry
Nick Easter Dulwich College - an independent, public school for boys in Dulwich, southeast London, England. The college was founded in 1619 by Edward Alleyn
Ben Morgan Katharine Lady Berkeley's School - an academy school near Wotton-under-Edge, Gloucestershire, England, for ages 11 to 18.
Billy Vunipola Harrow School - an English independent school for boys situated in the town of Harrow, in north-west London
Danny Care Prince Henry's Grammar School (Specialist Language College) - a secondary school and sixth form established in 1607 in the market town of Otley, West Yorkshire, England.
Richard Wigglesworth Kirkham Grammar School - a selective, co-educational independent school in Kirkham, Lancashire, England.
Ben Youngs Gresham’s School - an independent coeducational boarding school in Holt in North Norfolk, England.
Owen Farrell St George's School, Harpenden (also known as St George's) - a day and boarding school in Harpenden, Hertfordshire, England
George Ford Rishworth School - a co-educational independent school in the village of Rishworth, near Halifax, in West Yorkshire, England.
Brad Barritt Kearsney College - a private boarding school for boys in Botha's Hill, a small town between the provincial capital of Pietermaritzburg and Durban, in the KwaZulu-Natal province of South Africa.
Sam Burgess Heckmondwike Grammar School (HGS) - a state selective, coeducational grammar school providing free education,[3] located in Heckmondwike, West Yorkshire, England.
Jonathan Joseph Millfield - a co-educational independent public school
Henry Slade Plymouth College - a co-educational independent school in Plymouth, Devon, England, for day and boarding pupils from the ages of 3 to 18.
Jonny May The Ridgeway School & Sixth Form College - a coeducational secondary school and sixth form with academy status, located in Wroughton in the English county of Wiltshire.
Jack Nowell Mounts Bay Academy (formerly Mounts Bay School) - an academy school in Heamoor, Penzance, Cornwall, England.
Anthony Watson St George's Weybridge - independent mixed Roman Catholic co-educational day schools in Surrey, England taking pupils from 3-18.
Mike Brown Wyvern College, or Wyvern - a secondary school in Salisbury, Wiltshire for boys aged 11 to 16
Alex Goode Oakham School - a British co-educational independent school in the market town of Oakham in Rutland, with a school roll of about 1,000 pupils, aged from 10 to 18
20 out of 32 from private schools. Just over 60%. (About 7% of UK children go to private schools.)