The real key here is in the context of the school. DG
This is what I thought!
When DS was at the school (now Yr 7) they didn't have anything for his year but I don't know if they didn't think it was worth it (they were a bit of a nightmare year) or whether they just didn't do it then.
However, from Yr 3 a small group of children including DD were given different maths to the rest of the class. It was intended to stretch them and give breadth to the curriculam as opposed to bringing them on faster and getting them ahead of their peers, which I thought was a good idea and DD really enjoyed the work.
Since she's gone into Yr 4, they have continued with the maths approach, mainly as all the parents of the kids in the group have asked them to and have now added the English.
I don't know whether it's because her brother has gone to a GS but her teachers are already telling me that she is GS material
I still think it's a bit early to tell and I don't know whether it will suit her but she wants a tutor like her big brother when she gets to Yr 5