Jones and Robinson join fellow All White Arwel Thomas who stared in the Hong Kong event back in May. Following Welsh Scottish League duties Jason Forster is also back to captain the Squad.
No Pontypridd players were considered because of their Parker Pen Shield final commitments but three club members Gareth Baber, Shaun James and Gareth Wyatt will come back into the Squad for the following week-ends finale at the Millennium Stadium.
London & Cardiff tournaments
1. Jason Forster Newport
2. Robin Sowden-Taylor Cardiff
3. Gareth Gravell Newport
4. Rhodri Jones Swansea
5. Arwel Thomas Swansea
6. Ben Breeze Newport
7. Gareth Swales Swansea
8. Emyr Lewis Newport
9. Matthew Robinson Swansea
10. Craig Richards Whitland
11. Andy Powell Newport
12. Mike Phillips Llanelli
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series