Hi Lesley, thanks for your suggestions. I'll try to get any smell from that plant. I thought not all the species of Thyme were fragrant though. Or my nose isn't sensitive enough
After visiting Waterperry Gardens today I got an idea it might be Thymus herba-barona.
Regarding the first pic, there is a Cyclamen there in the middle but my question was about two small one leaf seedlings on both sides of the Cyclamen plant. In my opinion they are exactly the same as the flowering R. kochii which I planted last year.