When Wren introduced the “worth £200” claim on its free design service, its staff were told that it stacked up, because John Lewis charged £200. Everybody else did it free.
Others imitated, as they do. This was Wickes, in September 2019:
However, this is Wickes today:
This is Homebase:
Here’s the thing, though: John Lewis – which has been through a bit of a kitchens supply adventure – now charges a “redeemable” £50 – leaving Wren’s value claim, as far as I can see, unsupported.