Ruddock, whose side have won their opening three RBS 6 Nations matches, took the opportunity to shuffle his pack in the win against Italy last time out but has welcomed back some familiar faces for the Scottish showdown.

Luke McGrath takes the No. 9 jersey while the pack has been re-jigged with James Rael joining Peter Reilly and Kyle McCall in the front row.

Iain Henderson moves from five to four and will partner Danny Qualter while the back row has a fresh face in the shape of Aaron Conneely.

On the bench Callum O’Connell takes his place in the 22 for the first time and Ruddock said: “We have reinstated a few of the lads that were involved in the win against France; we felt that they deserved to come back into the equation for this test.

“We certainly don’t underestimate the Scottish side, I have looked at their tapes and realise that our defence are going to have to work very hard to stop them crossing the line.

“We have prepared to the best of our ability and are ready to front up to a very talented Scotland team.”

Ireland Under-20s:

15 - Shane Layden
14 - Conor Finn
13 - Chris Farrell
12 - JJ Hanrahan
11 - Foster Horan
10 - Paddy Jackson
9 - Luke McGrath
1 - Kyle McCall
2 - James Rael
3 - Peter Reilly
4- Iain Henderson
5 - Daniel Qualter
6 - Conor Gilsenan
7 - Aaron Conneely
8 - Jack Conan

Replacements
16. Callum O’Connell
17. Des Merrey
18 - Jake Cawley
19. Tadhg Beirne
20. Jordan Coghlan
21. Kieron Marmion
22 - Cathal Marsh
23 - Stuart Olding