Can anyone recommend a good legal team to assist with ending tenancy please

Recommendations are against the charter 😉

You might be better off asking on the local board or ask in the locality. You won't need a legal team a local legal general practitioner will do, it is not a complicated job.

It can be extremely complicated and many local solicitors wouldn't have a clue if it is a residential property. I know solicitors who paid a barrister to get a tenant out of their own property.

You really don't need to be a legal eagle to interpret the Residential Tenancies Act, it spells things out in pretty plain English. I have become well versed in it myself from having to deal with landlords (including two who served invalid evictions).

You could also contact Threshold or the PRTB and they will tell you what rules apply in this instance. For ending tenancies there are rules regarding what constitutes valid notice and what notice periods they are entitled to based on length of tenancy, are they Part IV and what contract is in place.

It's actually not true at all that tenants can 'do whatever they like', unfortunately some don't understand that 'what they like' is to not have their entire life disrupted at the whim of a landlord who thinks they can turf them out for any reason without giving them enough time to find other accommodations. Having to move against your will is incredibly stressful at the best of times, in the current climate it's purely horrific.

Does the tenancy have to end because the landlord is incapacitated? What's your involvement are you taking over the estate or something?

Yes they have to leave because it makes it almost impossible to sell otherwise. Also will hurt the value of the property if you do manage to sell it.