Would any be kind enought to answer the question below. I Have read through faqs & threads but did not spot/track down the answer:-

If three members of a household account each have avios reaching expiry and one makes an avios redemption on for e.g an experience (which automatically takes a share of the spend from all members of that account) does that reset expiry for all or only the one making the redemption?

Thanks,

Flambs