Numerise are running a free "Secondary Ready" course for Year 6 students starting in September.
Paper 1 Questions & Video Solutions
Paper 1 Answers
Here are the 2019 KS2 SATs papers.
Mr Neill, the Head of Maths at St Cuthbert's, has made videos of the solutions to each question. Just scan the QR code next to each question using the camera on your phone/tablet.