So, the plan is that they will remain where they are until 4:30pm Tuesday 24 September. The Research Room will then be closed 25th–29th, reopening in its new office in Werburgh Street, Dublin 2, on Monday 30 September at 9:30am.
The new building has no name. It is located about 150 yards from Werburgh Street's junction with Castle Street, and there's a bus-stop right outside.
Notices about the move are expected to start appearing in the National papers this weekend.
UPDATE: Saturday 21 September: And sure enough, the adverts have been published. See below.