The 1970 British Hard Court Championships, also known by its sponsored name Rothmans Open Hard Court Championships of Great Britain, was a combined men's and women's tennis tournament played on outdoor clay courts at the West Hants Tennis Club in Bournemouth in the United Kingdom.

The men's events were part of the 1970 Pepsi-Cola Grand Prix circuit and categorized as Class 2.

Mark Cox and Margaret Court won the singles titles.

Cox won £2,000 first-prize money while Court, who successfully defended her 1969 title, received £1,000 for her singles win.

[2][3][4] Mark Cox defeated Bob Hewitt 6–1, 6–2, 6–3 Margaret Court defeated Virginia Wade 6–2, 6–3 Tom Okker / Tony Roche defeated William Bowrey / Owen Davidson 2–6, 6–4, 6–4, 6–4 Margaret Court / Judy Tegart defeated Rosie Casals / Billie Jean King 6–2, 6–8, 7–5 Billie Jean King / Bob Hewitt defeated Virginia Wade / Bob Maud 6–2, 6–2