I agree that you will need a filling. In the US, I would code for a 1 surface anterior composite filling. You may need a gum graft. Before considering a gum graft, you and your dentist need to figure out why you are having gum damage there or the future graft will fail.
First, do you have any medical conditions such as auto immune disorder, immune deficiencies, diabetes, or heart conditions? Are you taking any significant medications, blood thinning agents, and/or herbals supplements? Second, I recommend using Sonicare or Oral B electric toothbrush. You should not have any plaque left there or any grafts will fail. You need to brush more gentle but thorough.
If you have an anterior open bite where your lower teeth are not touching your upper teeth, your lower teeth may continue to hyper-erupt. I personally have this condition.