Corrections and clarifications

• In an article about an increase in the number of Welsh-language schools, the headline and text referred to Welsh-only teaching. To clarify, this is Welsh-first teaching. Children in the schools mentioned are taught in Welsh first and are initially assessed in Welsh. A quote attributed to Save the Children came from a guide by Save the Children UK’s education team for use in multilingual settings around the world, and not exclusively for Wales (Welsh-only teaching – a political tool that harms children?, 20 June, page 37).

• The results of a placebo-controlled trial of the most common form of shoulder surgery are not due to be published next month as we said in an article about the possibility that people could be undergoing unnecessary procedures. The study is still under review by a journal and does not yet have a publication date (Many common operations may be unnecessary, say researchers, 12 June, page 12).

• Other recently corrected articles include:

Cannes Young Lions Media: UK wins gold

The old Tory order is crumbling – it’s taken Grenfell for us to really see it