Free seeds Chester/Wrexham

Went to the grosvenor garden center just outside Chester/Wrexham this weekend.
If you buy 2 packets of T&M seeds you can get a pack of Beetroot seeds (chioggia pink) and a pack of broccoli seed (rudolf) for free.
Help yourself from the shelf
Doesn't say how many seeds are in the packets but feels / sounds like there are quite alot.