Freebies Sarah Raven - Free Seeds for first 500 with GW code

I received an email from Gardner's World Magazine with various offers.
If you use the code GW16WAPR with any purchase from Sarah Raven and are in the first 500, then you get £12.50 worth of flower & veg seeds free.
Varieties are :-

Ammi Majus
Calendula
Sweet Pea
Chard
Asolo Lettuce
Carrot

I've ordered a packet of Dianthus carthusianorum, which took my fancy, was lucky enough to be the first 500. The site appears to tell you after entering the code at checkout.

https://www.sarahraven.com/customer/pages/GW16WAPR

Good luck.