Ocado - how to associate a partner card with your order?

[bojo7]

Can anyone help? I have googled this without success and sent an email to Ocado without reply.

I have a partner card as a family member works in Waitrose, so I get 15% off my shopping. I am trying to use Ocado for the first time, but cannot find out how to tell Ocado I have this card. Has anyone managed to do this?
Thanks!

Can you even link a Partner card since Ocado is nothing to do with John Lewis and Waitrose?

You can't use it on Ocado. Waitrose or John Lewis only

Thanks! I did finally get a reply from them and it is as you say.