The values in the book are just an average generic value for savoury rices etc - but some varieties have syns others are free.
If you are a paying member of slimming world you can look up specifics on the website - if not its best to ask on here for specifics as they do vary.
Alternatively - its always worth trying a search to see if your question has been answered before -chances are it already has! Just type something like "batchelors rice" in the search box, select the "www.minimins.com" button (not web)and voila! Also, try the sticky thread with the "commonly asked syn values" for lots of FAQs of this type.
To start you off though - most if not all Batchelors savoury rice are free on green and EE, and the Ainsely Harriott varieties of cous cous are around 1/2 - 1 syn per 100g cooked weight on green and EE.