Should I get temporary or permanent SMP in FUE scars? Which clinics in UK are best for this? (Photo)

Hi everyone, I am interested in getting SMP to cover disguise my FUE scars. I have attached photos (sorry about the haircut - it was a self cut during lockdown). I usually don’t get my hair cut down past a number 3 guard but I would like to start getting it cut shorter after SMP. Is it better to get temporary or permanent SMP? Can anyone recommend good SMP clinics in the UK? I am worried about the dots turning blue or green and the ink bleeding. Thanks for your help.