Leinster midfielder Ringrose has picked up a hamstring complaint, while Toner aggravated an existing ankle problem in Saturday’s 32-20 Dublin defeat by England.
Wing Keith Earls appears to have proved his fitness after a hip concern by training on Tuesday, but Ireland must now face the Scots without three key operators, with CJ Stander already missing due to facial fractures.
Ireland confirmed their mounting injury issues on Twitter, with head coach Joe Schmidt now facing a significant reshuffle of his resources.
The absence of Leinster lineout specialist Toner will prove the biggest miss to boss Schmidt and Ireland.
— Irish Rugby (@IrishRugby) February 5, 2019
The 32-year-old has only missed six Test matches since Schmidt took the helm in November 2013, with the Kiwi coach drawing heavily on his set-piece acumen.
Ulsterman Henderson’s finger problem and Munster star Beirne’s knee complaint thinned Ireland’s locking stocks and Toner’s absence will heavily test Schmidt’s squad depth.
Munster lock Billy Holland has also been added to Ireland’s squad this week as further cover.
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