Thanks for the reply Kingboo!
I really appreciate the feedback from everybody, many thanks!
I’m going to send the card in for grading anyway, if it gets a 6, so be it I can live with a couple of tiny dimples on the back.
The rest of the card is fantastic otherwise, especially on the front which does look mint.
In all honesty they look a lot worse in the photos - I’ve had to angle the card in the light to create the shadow to show them as just looking at the card straight on you don’t notice them.
From what I understand these dimples are usually caused by tiny specks of debris/particles on the dies when the cards are being manufactured.
There a few examples of it happening to sports cards on the net though I guess it’s rarer for pokemon cards.
I came across this whilst searching which I found interesting. Again looks like a similar dent/dimple issue.