Data supplied by owners:

For the IPF Report on Turnover-based leases, valuers emphasised the need to understand the affordability of rents to the current occupier, their past turnover and future projections. Despite this, nine out of eleven valuers reported that they were restricted by a lack of data when valuing leases with turnover-based rents.

The summary report and full version (only available to members) 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–november-2021–at-a-glance.html