Eurostar redemption

Hi - my partners FC Air miles expire in May and he has no plans to Fly this year.
But we plan to go to Paris in July and was wondering if FC allow you to book Eurostar ticket for travel after the expiry date as long as the tickets are booked prior to expiry (if that makes sense to you)?
Basicaly, his miles expire in May but we don't want to travel until July. When the Eurostar fares are bookable in April can this be done? or does not work like that? I know VAA insist the the O/B leg is booked before the miles expiry but I hoping that Eurostar redemption has different rules.
Typed on my iPhone so apologies for any mistakes.
Thanks
But we plan to go to Paris in July and was wondering if FC allow you to book Eurostar ticket for travel after the expiry date as long as the tickets are booked prior to expiry (if that makes sense to you)?
Basicaly, his miles expire in May but we don't want to travel until July. When the Eurostar fares are bookable in April can this be done? or does not work like that? I know VAA insist the the O/B leg is booked before the miles expiry but I hoping that Eurostar redemption has different rules.
Typed on my iPhone so apologies for any mistakes.
Thanks