Valuers reported to the IPF Report on Turnover-based leases, that estimating Market Rent requires an understanding of the (likely) turnover achieved, whether based solely on the store or similar stores, and by occupier type. Despite this, no external datasets were cited of turnover trends by occupier and property type in the UK.

Should this data be collected?

The full version of the IPF Report: Turnover-based leases, the issues, drivers and challenges, a survey of best practice can be found at

https://www.ipf.org.uk/resourceLibrary/turnover-based-leases-survey-of-current-practice–october-2021–summary-report.html