Results
Eleven PIs, and 10 ESPs from across the eight trial sites were invited to participate. Eight ESPs and six PIs from seven trial sites participated. All PIs were consultant knee surgeons and are referred to as consultants from hereon. All consultants were male. All ESPs were experienced musculoskeletal physiotherapists and included 4 males and 4 females. Participants had been in their role on the STAR project for between 18 months and 4 years at time of interview. The sites were located in North, Central and South England, and Wales. We have not provided a table of participant characteristics to protect anonymity.We present the findings using the three general items from NoMAD, which aimed to elicit a global sense of the potential for normalization, and then the four core constructs from NPT. Subheadings describe the main implementation considerations apparent within each construct. Illustrative quotations relating to participants’ experiences are in 