Santo Mengoli

Is it Christian NOT to accept someone who comes to the congregation and asks for forgiveness ?  Asking for forgiveness is not the only criteria as John the Baptist made clear at Matt 3:8.
"Thank you Eoin, But I am sure you have an opinion of your own" you said. Well here is my opinion:
If a person is sick, they need medical attention. If their sickness is contagious, additional precaution must be taken to avoid infecting others and this may include isolation until the sickness is no longer contagious. Sadly, some do not recover despite the best medical attention.
In the case of patients who respond to medical attention, those with the appropriate training and experience will manage the recovery of afflicted ones and their rehabilitation to the community. Although the process may be lengthy and procedures unpleasant, a successful outcome will outweigh temporary difficulties. Interestingly, although the  process has become sophisticated in modern times, something similar is well outlined in Leviticus 13. 
Spiritual sickness needs spiritual attention. In the case of unrepentance over serious sin, this is a symptom of serious spiritual sickness. This spiritual sickness needs the additional precaution of isolation from others to avoid infecting them, hence the disfellowshipping arrangement. Although a severe measure, this has the aim of restoration to spiritual health. James 5:14 applies in principal to the recovery process, with the latter part of Jude 23 indicating the need for caution in handling such matters. Managing the spiritual recovery and rehabilitation of spiritually sick ones is the responsibility of those with "spiritual qualifications" (Gal 6:1) and is best left to them. Sadly, some do not recover despite the best spiritual attention (Ph 3:18).
However, for those who are restored to spiritual health and are reinstated, then Ecc 7:8 applies to their experience, or for more detail, Heb 12:11.
I am sure you will understand in the case of physical sickness as described above, well intentioned, but inappropriate, contact and action on the part of untrained friends and relatives outside of the medical parameters would only serve to put the afflicted one and themselves at risk. However, once recovery has been confirmed, then there is no limitation. No less so in a spiritual context.

This is not a matter for discussion in this forum, or even between friends.  That is the Christian Way, where love rules.  There are no time rules and no Pharisaic approach.  The judicial committee will discuss lovingly with the disfellowshipped person what he needs to do to be reinstated and the truly repentant person will humbly and lovingly accept the counsel.  Discussing the matter outside of the judicial committee arrangement is not loving to the disfellowshippped person, the elders involved or our organisation.  The elders on the judicial committee, as an act of love, will not discuss the details of the case even with other elders on the body.