This forum has been a good source of information for myself so i wanted to update with my experience in the hope it will give more information on the whole process.
I found a greyish 3mm wide line on my large toenail in November 2020. I am of mixed race heritage, early 30's and my mother has had melanoma so i knew i could be of increased risk of Subungual Melanoma. I went to the GP and he suggested it could be a Subungual Haematoma and to wait 4-6 weeks to see if it had grown out. I wasn't happy to do this so paid to see a private dermatologist. He reviewed it and said it was a benign longitudinal melanonychia and to get it reviewed again in 3 months.
I moved areas and went to see another dermatologist 3.5 months later. This dermatologist was concerned as i only had the line on my one toe nail and due to my family history, so i was reffered back to the NHS under the TWW scheme.
I was seen 1 week later, that dermatologist was also sure it was benign but having read the experience of people on these forums i pressed for a biopsy to be completed as i know this is the only 100% way to confirm this so he agreed.
I had my operation pencilled in the week after. This was then cancelled on the morning of the op because they couldn't find the correct equipment. It was then rescheduled for 2 weeks later and went ahead. Operation took about 45 minutes and was uncomfortable and quite a bit of bleeding. I recommend getting some strong painkillers as i was in quite a lot of pain for 4-5 days. I've only been able to properly start walking on my feet again 4 weeks later so it takes a long time to recover.
I had to wait 4.5 weeks for results and they had to be sent off for supplimentary testing due to this being a toe nail biopsy which doesn't seem to be a common occurance at my hospital. My results have come back all fine.
Hoping this provides a bit of insight on my experience and helps others know what to expect. Thanks Angie on this forum for helping to comfort people when needed!